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PUTRAJAYA, Malaysia — Malaysia's government said Wednesday it will pay U.S. company Ocean Infinity up to $70 million if it can find the wreckage or black boxes of Malaysia Airlines Flight 370 within three months, in a renewed bid to solve the plane's disappearance nearly four years ago.

Transport Minister Liow Tiong Lai said there was an 85 percent chance of finding the debris in a new 9,653 square mile area — roughly the size of Vermont — identified by experts.

The government signed a "no cure, no fee" deal with the Houston, Texas-based company to resume the hunt for the plane, a year after the official search by Malaysia, Australia and China in the southern Indian Ocean was called off. The plane vanished on March 8, 2014, while flying from Kuala Lumpur to Beijing with 239 people on board.

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"The primary mission by Ocean Infinity is to identify the location of the wreckage and/or both of the flight recorders ... and present a considerable and credible evidence to confirm the exact location of the two main items," he told a news conference.

The Malaysia Airlines Boeing 777 that vanished is seen in a photo taken at Los Angeles International Airport on Nov. 15, 2013. Jonathan Morgan, file

If the mission is successful within three months, payment will be made based on the size of the area searched. Liow said the government will pay Ocean Infinity $20 million for 1,930 square miles of a successful search, $30 million for 5,790 square miles, $50 million for 9,653 square miles and $70 million if the plane or recorders are found beyond the identified area.

Ocean Infinity Chief Executive Oliver Plunkett said the search vessel Seabed Constuctor, which left the South African port of Durban last week, is expected to reach the southern Indian Ocean by Jan. 17 to begin the hunt.

He said eight autonomous underwater vehicles, which are drones fitted with high-tech cameras, sonars and sensors, will be dispatched to map the seabed at a faster pace. Plunkett said the underwater drones can cover 463 square miles a day.

"We have a realistic prospect of finding it," he said. "While there can be no guarantees of locating the aircraft, we believe our system of multiple autonomous vehicles working simultaneously is well suited to the task at hand."

The official search was extremely difficult because no transmissions were received from the aircraft after its first 38 minutes of flight. Systems designed to automatically transmit the flight's position failed to work after this point, said a final report from Australian Transport Safety Board last January.

"I feel very happy but at the same time very panicky whether it can be found or not. Now it's back to four years ago where we have to wait everyday (to find out) whether debris can be found," said Shin Kok Chau, whose wife Tan Ser Kuin was a flight attendant on MH370.