One person was shot and killed at Will Rogers Airport (OKC) in Oklahoma City, Oklahoma, and the suspect has been found dead in a vehicle, police say. All flights out of the airport had been halted and inbound flights diverted.

Oklahoma City Police confirmed Tuesday evening that the suspect, a white male, was deceased and found, apparently with a self-inflicted gunshot to the head, sitting inside a red pickup truck, but they did not release a name.

Suspect from Airport shooting is confirmed deceased, found inside a vehicle; name not released at this time. See Facebook for live feed. — OKC Police Dept (@okcpd) November 16, 2016

Police identified the deceased victim as Michael Winchester, a Southwest Airlines employee. Winchester, 52, died in the hospital after being reported in critical condition. Carey Murdock of WWLS reported that Winchester had been a punter for the University of Oklahoma Sooners football team and was the father of James Winchester, a former Sooner and current player for the Kansas City Chiefs.

Police also said they would be corralling travelers from inside the airport to SW 67th and Terminal Drive.

The deceased victim from Will Rogers Airport has been identified as Michael Winchester, an employee of Southwest Airlines. — OKC Police Dept (@okcpd) November 15, 2016

Shots were fired in the parking lot area of the airport, said Captain Paco Balderrama of the OKCPD. He confirmed that one person was shot.

We have closed Will Rogers Airport at this time. If you are inside of the airport, shelter in place until advised otherwise. — OKC Police Dept (@okcpd) November 15, 2016

CONFIRMED: The victim who was shot today at Will Rogers World Airport has died. Per @okcpd — Jessica Brogdon (@Jessica_NewsGal) November 15, 2016

By 3:25pm local time, the police confirmed that the victim had died. The person was only identified as a 52-year-old Southwest Airlines employee.

We can confirm that victim from shooting at WRWA is deceased. Airport still on lockdown as investigation is ongoing. — OKC Police Dept (@okcpd) November 15, 2016

The airport said the shooting took place in the parking area outside the terminal.

#BREAKING:Police: Shots fired at Oklahoma City airport, at least one injured. Read more here:https://t.co/EdTG9O2U7K — CBS 6 Albany - WRGB (@CBS6Albany) November 15, 2016

An FBI SWAT team was reported on the scene, and a bomb squad was called to examine a vehicle belonging to the possible suspect.

Flights to OKC are diverting to other airports or turning back.

Passengers on one United Airlines flight that had landed are reportedly being allowed to disembark, but the airport remained on lockdown as the search for the suspect continued.

They did let one United Airlines flight unload passengers, still no updates. A @SouthwestAir flight on Tarmac being assisted (not sure why) pic.twitter.com/8thP0coz6E — Garnie Bolling (@GarnieBolling) November 15, 2016

According to one KFOR reporter on the scene, police discovered a "sniper's nest" in the airport's parking garage.

My sources tell me police discovered a "sniper's nest" in the parking garage at Will Rogers Airport. #BREAKING@kfor — Lance West (@lancewest) November 15, 2016

Around 3:10pm local time, the police started letting vehicles leave the lockdown area, one by one.

All Southwest flights in and out of the airport have been canceled until 6:00pm local time (midnight GMT).

Cars are leaving one by one at Will Rogers World Airport. These cars had been stranded for about two hours. @koconewspic.twitter.com/xu9bwM0KqV — Jonathan Cooper (@KOCOCooper) November 15, 2016

The only plane allowed to land at the airport during the lockdown was a Department of Justice prison transport.

Ground stop continues at Will Rogers World Airport. One Dept. of Justice plane bound for Fed. Transfer Prison was allowed to land. — Will Rogers Airport (@fly_okc) November 15, 2016

Will Rogers World Airport is located about six miles (8 km) southwest of downtown Oklahoma City, and handles almost four-million passengers a year. A third of the flights to and from the airport are operated by Southwest.