People stand on the tarmac at the Fort Lauderdale-Hollywood International Airport after a shooter opened fire inside the terminal, killing several people and wounding others before being taken into custody, Friday, Jan. 6, 2017, in Fort Lauderdale, Fla. AP Photo/Lynne Sladky

A total of 13 people shot, five people killed.

FBI has taken over the investigation.

Suspected shooter is in federal custody.

Suspect walked into Anchorage, Alaska, FBI office in November, was taken into custody by local police at the time and taken to a medical facility.

Investigation spans several states connected to the suspect.

Airport operations expected to resume at 5 a.m. Saturday.

Five people were killed in a mass shooting in the baggage-claim area of Terminal 2 at Florida's Fort Lauderdale International Airport just before 1 p.m. on Friday. At least seven others were injured and taken to area hospitals, Broward County Sheriff Scott Israel said in a Friday night news conference.

The suspected attacker, identified as 26-year-0ld Esteban Santiago, was shot by police and taken into custody. Santiago is now in federal custody and is expected to appear in court on Monday.

NBC's Pete Williams reported that Santiago had signed up to serve in the National Guard in August 2016 and had been living in Alaska. He was born in New Jersey, Williams reported, and his family was originally from Puerto Rico.

The suspect is in federal custody. Broward County Sheriff Scott Israel confirmed that there were no additional incidents in any of the other terminals.

"At this point it looks like he acted alone," he said of the suspect. Investigators said terrorism has not been ruled out as a possible motive.

—CBS Evening News (@CBSEveningNews) January 6, 2017

The suspect was apparently receiving some form of psychological treatment while in Alaska, according to The Associated Press, which cited the suspect's brother, Bryan Santiago. FBI spokesman George Piro said in a news conference Friday night that Santiago walked into an FBI field office in Anchorage last November and spoke to detectives.

After the conversation, Santiago was taken into custody by local police and admitted to a medical facility for an evaluation, Piro said.

It is unclear what type of treatment the suspect may have received.

Santiago, who was born in New Jersey but grew up in Puerto Rico, served in Puerto Rico's National Guard and was deployed to Iraq in 2010. His aunt, who lives in New Jersey, told reporters that Santiago had started acting strangely when he returned from Iraq, and about a month ago "lost his mind."

"He said he saw things," she said.

Santiago served in the Alaska National Guard when he moved to Anchorage in 2014, but received a "general discharge" from in August for "unsatisfactory performance."

Shooter traveled from Alaska

Travelers are evacuated out of the terminal and onto the tarmac after airport shooting at Fort Lauderdale-Hollywood International Airport in Florida, U.S., January 6, 2017. Andrew Innerarity/Reuters

Santiago flew Delta from Anchorage, Alaska to Fort Lauderdale via Minneapolis-St. Paul on Thursday night, NBC reported.

He arrived in Fort Lauderdale late Friday morning, which is when he apparently he used a gun he had checked into his luggage to carry out the massacre in the baggage claim area of Terminal 2.

The Transportation Security Administration allows passengers to transport unloaded firearms in a locked, hard-sided container "as checked baggage only," according to its website.

"Only the passenger should retain the key or combination to the lock" on the container, the guidelines state, and the firearm must be declared "each time you present it for transport as checked baggage."

All services at the airport have temporarily been suspended until 5 a.m. Saturday morning.

'Execution-style' murder

Video released from inside the baggage claim area appears to show the aftermath of the shooting at Terminal 2. A witness told CBC that the gunman shot several people "execution-style" as they waited for their bags.

The attacker was wearing a dark blue T-shirt and was silent as he opened fire with a handgun, witnesses told MSNBC. He had time to reload as he shot people in the head, one witness said, but "threw down his gun and laid on the ground spread eagle" after he ran out of ammunition.

Video released from inside Fort Lauderdale airport baggage claim area pic.twitter.com/QVfWnhhNiE — WSVN 7 News (@wsvn) January 6, 2017

A witness to the shooting shared a graphic photo on Twitter that showed a man bleeding on the lower level of the airport.

Florida Gov. Rick Scott traveled to the airport to be briefed on the attack. Florida Sen. Marco Rubio tweeted that he is "praying for the victims and everyone at the #FortLauderdale airport. #FLL."

President-elect Donald Trump tweeted that he is "monitoring the terrible situation in Florida. Just spoke to Governor Scott. Thoughts and prayers for all. Stay safe!"

President Barack Obama was briefed on the shooting, the White House said.

The Federal Aviation Authority issued a ground stop for all flights at Fort Lauderdale airport, one of the country's busiest transport hubs. The airport is in South Florida's Broward County, about 30 miles north of Miami.

Bryan Logan contributed reporting.