Story highlights Australian Prime Minister says two objects are seen in the southern Indian Ocean

An Australian air force plane is attempting a closer inspection, Australian media report

President Barack Obama says search for Flight 370 is ''a top priority''

No information of significance has so far been found on any passengers, authorities say

Authorities have spotted two objects in the Indian Ocean that are possibly related to the search for missing Malaysia Airlines Flight 370, Australian Prime Minister Tony Abbott said Thursday.

"New and credible information has come to light in relation to the search for Malaysia Airlines flight MH370 in the southern Indian Ocean," Abbott said in the the Australian House of Representatives in Canberra. "The Australian Maritime Safety Authority has received information based on satellite imagery of objects possibly related to the search.

"Following specialist analysis of this satellite imagery, two possible objects related to the search have been identified," he said. "I can inform the House that a Royal Australian Air Force Orion has been diverted to attempt to locate the objects."

Three other planes will carry out a "more intensive follow-up search," he said.

Australian search teams have been at the forefront of the hunt for the missing plane in the remote southern Indian Ocean.

The announcement from Abbott raises hopes of finding parts of the plane after a huge search that is now in its 13th day. Previous reports of debris found in the sea have not turned out to be related to the passenger jet, which vanished over Southeast Asia earlier this month.

But those reports came before the search area was massively expanded into two large arcs, one that heads northwest into Asia, the other southwest into the Indian Ocean.

The Malaysian military is checking the new information from Australian authorities, a source close to the investigation told CNN.

"Verification might take some time. It is very far and it will take some time to locate and verify the objects," the source said.

Malaysia's Acting Transportation Secretary Hishammuddin Hussein said Abbott had informed Malaysian Prime Minister Najib Razak of the development Thursday.

"At this stage, Australian officials have yet to establish whether these objects are indeed related to the search for MH370," Hishammuddin said.

Other pieces of information related to the investigation into the plane's disappearance had emerged Wednesday.

Flight simulator probed

Investigators looking at the flight simulator taken from the home of Capt. Zaharie Ahmad Shah, the pilot of the plane, have discovered that some data had been deleted from it, Hishammuddin said at a news conference.

What the revelation means is unclear. It could be another dead end in an investigation that has been full of them so far, or it could provide further evidence for the theory that one or more of the flight crew may have been involved in the plane's disappearance 12 days ago.

"It may not tell us anything. It's a step in the process," one U.S. law enforcement source told CNN. "It could be a very insignificant detail in the process."

Investigators have been looking into the background of all 239 passengers and crew members aboard the plane that vanished in the early morning hours of March 8 while en route from the Malaysian capital of Kuala Lumpur to Beijing.

Particular attention has focused on the pilot and first officer on Flight 370, but authorities have yet to come up with any evidence explaining why either of them would have taken the jetliner off course.

Hishammuddin didn't say what had been deleted, but simulation programs can store data from previous sessions for later playback. He also did not say who might have deleted the data.

FBI examination

Specialists are examining the simulator in hopes of recovering the data that was deleted, Hishammuddin said.

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Photos: The search for MH370 Photos: The search for MH370 Two years after Malaysia Airlines Flight 370 went missing, a relative of one of the passengers burns incense in Beijing on March 8, 2016. Flight 370 vanished on March 8, 2014, as it flew from Kuala Lumpur, Malaysia, to Beijing. There were 239 people on board. Hide Caption 1 of 43 Photos: The search for MH370 On July 29, police carry a piece of debris on Reunion Island, a French territory in the Indian Ocean. A week later, authorities confirmed that the debris was from the missing flight. Hide Caption 2 of 43 Photos: The search for MH370 Staff members with the Australian Transport Safety Bureau examine a piece of aircraft debris at their laboratory in Canberra, Australia, on July 20. The flap was found in June by residents on Pemba Island off the coast of Tanzania, and officials had said it was highly likely to have come from Flight 370. Experts at the Australian Transport Safety Bureau, which is heading up the search for the plane, confirmed that the part was indeed from the missing aircraft. Hide Caption 3 of 43 Photos: The search for MH370 In late February, American tourist Blaine Gibson found a piece of plane debris off Mozambique, a discovery that renewed hope of solving the mystery of the missing flight. The piece measured 35 inches by 22 inches. A U.S. official said it was likely the wreckage came from a Boeing 777, which MH370 was. Hide Caption 4 of 43 Photos: The search for MH370 Relatives of the flight's passengers console each other outside the Malaysia Airlines office in Subang, Malaysia, on February 12, 2015. Protesters had demanded that the airline withdraw the statement that all 239 people aboard the plane were dead. Hide Caption 5 of 43 Photos: The search for MH370 A police officer watches a couple cry outside the airline's office building in Beijing after officials refused to meet with them on June 11, 2014. The couple's son was on the plane. Hide Caption 6 of 43 Photos: The search for MH370 Members of the media scramble to speak with Azharuddin Abdul Rahman, director general of Malaysia's Civil Aviation Department, at a hotel in Kuala Lumpur, Malaysia, on May 27, 2014. Data from communications between satellites and the missing flight was released the day before, more than two months after relatives of passengers said they requested it be made public. Hide Caption 7 of 43 Photos: The search for MH370 Operators aboard the Australian ship Ocean Shield move Bluefin-21, the U.S. Navy's autonomous underwater vehicle, into position to search for the jet on April 14, 2014. Hide Caption 8 of 43 Photos: The search for MH370 A member of the Royal New Zealand Air Force looks out of a window while searching for debris off the coast of western Australia on April 13, 2014. Hide Caption 9 of 43 Photos: The search for MH370 The HMS Echo, a vessel with the British Roya; Navy, moves through the waters of the southern Indian Ocean on April 12, 2014. Hide Caption 10 of 43 Photos: The search for MH370 A Royal Australian Air Force AP-3C Orion, on a mission to drop sonar buoys to assist in the search, flies past the Australian vessel Ocean Shield on April 9, 2014. Hide Caption 11 of 43 Photos: The search for MH370 A relative of a missing passenger cries at a vigil in Beijing on April 8, 2014. Hide Caption 12 of 43 Photos: The search for MH370 Australian Defense Force divers scan the water for debris in the southern Indian Ocean on April 7, 2014. Hide Caption 13 of 43 Photos: The search for MH370 A towed pinger locator is readied to be deployed off the deck of the Australian vessel Ocean Shield on April 7, 2014. Hide Caption 14 of 43 Photos: The search for MH370 A member of the Royal New Zealand Air Force looks at a flare in the Indian Ocean during search operations on April 4, 2014. Hide Caption 15 of 43 Photos: The search for MH370 On March 30, 2014, a woman in Kuala Lumpur prepares for an event in honor of those aboard Flight 370. Hide Caption 16 of 43 Photos: The search for MH370 The sole representative for the families of Flight 370 passengers leaves a conference at a Beijing hotel on March 28, 2014, after other relatives left en masse to protest the Malaysian government's response to their questions. Hide Caption 17 of 43 Photos: The search for MH370 A member of the Royal Australian Air Force is silhouetted against the southern Indian Ocean during the search for the missing jet on March 27, 2014. Hide Caption 18 of 43 Photos: The search for MH370 Flight Lt. Jayson Nichols looks at a map aboard a Royal Australian Air Force aircraft during a search on March 27, 2014. Hide Caption 19 of 43 Photos: The search for MH370 People in Kuala Lumpur light candles during a ceremony held for the missing flight's passengers on March 27, 2014. Hide Caption 20 of 43 Photos: The search for MH370 Malaysian Prime Minister Najib Razak, center, delivers a statement about the flight on March 24, 2014. Razak's announcement came after the airline sent a text message to relatives saying it "deeply regrets that we have to assume beyond any reasonable doubt that MH 370 has been lost and that none of those onboard survived." Hide Caption 21 of 43 Photos: The search for MH370 Grieving relatives of missing passengers leave a hotel in Beijing on March 24, 2014. Hide Caption 22 of 43 Photos: The search for MH370 A passenger views a weather map in the departures terminal of Kuala Lumpur International Airport on March 22, 2014. Hide Caption 23 of 43 Photos: The search for MH370 A Chinese satellite captured this image, released on March 22, 2014, of a floating object in the Indian Ocean, according to China's State Administration of Science. It was a possible lead in the search for the missing plane. Surveillance planes were looking for two objects spotted by satellite imagery in remote, treacherous waters more than 1,400 miles from the west coast of Australia. Hide Caption 24 of 43 Photos: The search for MH370 Satellite imagery provided by the Australian Maritime Safety Authority on March 20, 2014, showed debris in the southern Indian Ocean that could have been from Flight 370. The announcement by Australian officials raised hopes of a breakthrough in the frustrating search. Hide Caption 25 of 43 Photos: The search for MH370 Another satellite shot provided by the Australian Maritime Safety Authority shows possible debris from the flight. Hide Caption 26 of 43 Photos: The search for MH370 A distraught relative of a missing passenger breaks down while talking to reporters at Kuala Lumpur International Airport on March 19, 2014. Hide Caption 27 of 43 Photos: The search for MH370 On March 18, 2014, a relative of a missing passenger tells reporters in Beijing about a hunger strike to protest authorities' handling of information about the missing jet. Hide Caption 28 of 43 Photos: The search for MH370 U.S. Navy crew members assist in search-and-rescue operations in the Indian Ocean on March 16, 2014. Hide Caption 29 of 43 Photos: The search for MH370 Members of the Chinese navy continue search operations on March 13, 2014. After starting in the sea between Malaysia and Vietnam, the plane's last confirmed location, search efforts expanded west into the Indian Ocean. Hide Caption 30 of 43 Photos: The search for MH370 A Vietnamese military official looks out an aircraft window during search operations March 13, 2014. Hide Caption 31 of 43 Photos: The search for MH370 Malaysian air force members look for debris near Kuala Lumpur on March 13, 2014. Hide Caption 32 of 43 Photos: The search for MH370 Relatives of missing passengers wait for the latest news at a hotel in Beijing on March 12, 2014. Hide Caption 33 of 43 Photos: The search for MH370 A member of the Vietnamese air force checks a map while searching for the missing plane on March 11, 2014. Hide Caption 34 of 43 Photos: The search for MH370 A Vietnamese air force plane found traces of oil that authorities had suspected to be from the missing Malaysia Airlines plane, the Vietnamese government online newspaper reported on March 8, 2014. However, a sample from the slick showed it was bunker oil, typically used to power large cargo ships, Malaysia's state news agency, Bernama, reported on March 10, 2014. Hide Caption 35 of 43 Photos: The search for MH370 A U.S. Navy Seahawk helicopter lands aboard the USS Pinckney to change crews on March 9, 2014, before returning to search for the missing plane in the Gulf of Thailand. Hide Caption 36 of 43 Photos: The search for MH370 Buddhist monks at Kuala Lumpur International Airport offer a special prayer for the missing passengers on March 9, 2014. Hide Caption 37 of 43 Photos: The search for MH370 Members of a Chinese emergency response team board a rescue vessel at the port of Sanya in China's Hainan province on March 9, 2014. Hide Caption 38 of 43 Photos: The search for MH370 The rescue vessel sets out from Sanya in the South China Sea on March 9, 2014. Hide Caption 39 of 43 Photos: The search for MH370 Malaysian Prime Minister Najib Razak, center, arrives to meet family members of missing passengers at the reception center at Kuala Lumpur International Airport on March 8, 2014. Hide Caption 40 of 43 Photos: The search for MH370 A relative of two missing passengers reacts at their home in Kuala Lumpur on March 8, 2014. Hide Caption 41 of 43 Photos: The search for MH370 Chinese police at the Beijing airport stand beside the arrival board showing delayed Flight 370 in red on March 8, 2014. Hide Caption 42 of 43 Photos: The search for MH370 Malaysia Airlines Group CEO Ahmad Juahari Yahya, front, speaks during a news conference at a hotel in Sepang on March 8, 2014. "We deeply regret that we have lost all contacts" with the jet, he said. Hide Caption 43 of 43

Among them are experts at the FBI's forensics lab in Quantico, Virginia, who are examining a copy of the simulator's hard drive, as well as a copy of the hard drive from the computer of co-pilot Fariq Ab Hamid, law enforcement sources told CNN.

The FBI examination of the computer drives involves sorting through a large volume of data, according to a senior U.S. official with knowledge of the investigation.

"It is going to take some period of time, but we are analyzing it with a great degree of urgency. It is prioritized right at the top because the world is trying to figure this out," the official said on condition of anonymity.

Deleted files from Shah's simulator could reveal it had been used to practice diverting the plane and flying it to an unfamiliar airport, experts said. But even if investigators retrieve past simulations showing that Zaharie practiced flying to seemingly odd locations, that doesn't necessarily indicate evidence of anything nefarious, said Mary Schiavo, a CNN aviation analyst and former inspector general for the U.S. Department of Transportation.

"You put in strange airports and try to land there, just to see if you can do it," said Schiavo, adding that she sometimes does just that on the flight simulation program on her home computer.

'Grasping at straws'

President Barack Obama called the search for Flight 370 "a top priority," telling KDFW of Dallas on Wednesday that the United States will keep working on it.

"We have put every resource that we have available at the disposal of the search process," he said.

But beyond help with the computer drives, the Malaysian government has not put in a formal request for additional FBI help overseas, according to the senior U.S. official.

"We have made it clear we are ready to provide help whenever they need it," the official said. "We are grasping at straws. No one is running on anything white hot."

More than 60 ships and 50 aircraft are participating in the search. But at least two aircraft, a Japanese search plane and a U.S. Navy P-3 Orion, sat on a runway at a Subang air base this week after Indonesia refused to allow the planes to fly through its airspace.

"From what I understand, this is an international operation," Cmdr. William Marks, spokesman for the U.S. Navy's 7th Fleet, told CNN by telephone. "...I'm confident we're going to be flying today or very soon."

Later, Indonesia's military spokesman told CNN clearance was given to all search planes.

Although the search area spans nearly 3 million square miles, a U.S. government official familiar with the investigation said the missing plane is most likely somewhere in the southern Indian Ocean.

"This is an area out of normal shipping lanes, out of any commercial flight patterns, with few fishing boats, and there are no islands," the official said, warning that the search could well last "weeks and not days."

Angry families want answers

The lack of progress has angered and frustrated families, who have accused Malaysian officials of withholding information.

Some family members staged a protest at the Kuala Lumpur hotel where media covering the search are staying. Their efforts were cut short by security guards who removed them through a crush of reporters, dragging one as she screamed.

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"I don't care what your government does," one woman shouted, referring to the Malaysians. "I just want my son back."

The agony of the wait is also being felt by families in Beijing, the scheduled destination for Flight 370. They gather daily for a briefing with officials.

Ye Lun, whose brother-in-law is on the missing plane, says every day is the same. He and his group leave the hotel in the morning for a daily briefing, and that's it. They go back to the hotel to watch the news on television.

In a statement, Hishammuddin said Malaysian authorities "regret the scenes at this afternoon's press conference."

"One can only imagine the anguish they are going through," he said of the families. "Malaysia is doing everything in its power to find MH370 and hopefully bring some degree of closure for those whose family members are missing."

An abrupt change in direction

The disappearance continues to intrigue the public and frustrate officials, who have turned up no sign of the plane despite the involvement of teams from 26 nations.

On Tuesday, a law enforcement official told CNN that the aircraft's first major change of course -- an abrupt westward turn that took the plane off its route to China and back across the Malay Peninsula -- was almost certainly programmed by somebody in the cockpit.

The change was entered into the plane's system at least 12 minutes before a person in the cockpit, believed to be the co-pilot, signed off to air traffic controllers. Two minutes after the signoff, the plane's transponder stopped communicating details about the plane's altitude, speed and heading.

Some experts said the change in direction could have been part of an alternate flight plan programmed in advance in case of emergency; others suggested it could show something more nefarious was afoot.

But Hishammuddin said Wednesday that "there is no additional waypoint on MH370's documented flight plan, which depicts normal routing all the way to Beijing."

The Thai military, meanwhile, said it had spotted the plane turning west toward the Strait of Malacca early on March 8. That supports the analysis of Malaysian military radar that has the plane flying out over the Strait of Malacca and into the Indian Ocean.

But it didn't make it any clearer where the plane went next. Authorities say information from satellites suggests the plane kept flying for about six hours after it was last detected by Malaysian military radar.

Malaysian authorities, who are coordinating the search, say the available evidence suggests the missing plane flew off course in a deliberate act by someone who knew what they were doing.

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Background checks

Investigators are looking into the background of all the passengers and crew members on board the plane, as well as its ground crew, Malaysian officials have said. They've received background checks for all passengers on board, with the exception of those from Russia and Ukraine, Hishammuddin said.

So far, no information of significance has been found about any passengers, Hishammuddin said.

China says it has found nothing suspicious during background checks on its citizens on the flight -- a large majority of the plane's passengers.

And some experts have warned against hastily jumping to conclusions about the role of the pilots.

"I've worked on many cases were the pilots were suspect, and it turned out to be a mechanical and horrible problem," said Schiavo. "And I have a saying myself: Sometimes, an erratic flight path is heroism, not terrorism."

Ticking clock

Searchers are racing the clock in their efforts to find the plane and its flight-data and cockpit-voice recorders. The devices have batteries designed to send out pings for 30 days. That leaves 18 days until the batteries are expected to run out.

The task is being complicated by the scope of the search area, as well as the depth of some of the waters being searched -- up to 23,000 feet (7,000 meters).

Searchers trying to find and retrieve wreckage and bodies from Air France Flight 447, which crashed into the Atlantic Ocean in 2009, had to use unmanned submarines.

It took nearly two years to find the bulk of the wreckage, including the flight data recorders, in waters nearly 12,000 feet deep. It took even longer to determine what happened to the plane.