Airport was on lockdown this afternoon after at least one a passenger was shot and injured.
Police including an elite FBI SWAT team descended on Will Rogers World Airport, near Oklahoma city, at around 12.50pm local time after shots were fired in the parking lot.
Officers confirmed that one person had been shot and injured in the incident and that an ambulance had been rushed to the scene.
The suspected gunman is still on the loose and police are also urgently looking for a second victim believed to have also been shot in the incident.
The condition of the injured person was not immediately known, and they were rushed to a nearby hospital. Police said they could not confirm whether the person was dead or alive.
Photographs posted on social media show that police have cordoned off the entrance to the airport and are not letting any traffic in or out.
Speaking to reporters at the scene Oaklahoma Police Captain Paco Balderrrama said: “The information is still ongoing at this point in time and it’s still really unravelling.
“We got reports of shots fired in the parking lot area of Will Rogers Airport. At this point in time we’ve located one victim and we’re looking for a second reported victim. We do not have any information to put out as far as a suspect vehicle or a suspect itself but gunshots were heard.
“We’re really asking for everyone to stay away from the airport area. All the streets are blocked off you have a flight today contact your airline.”
Asked about the condition of the victim found at the scene, he replied: “I don’t know, I don’t have any more information. I don’t know whether they’re deceased or whether they made it.”
Earlier the Oklahoma Police department tweeted: “We have confirmed one victim shot at Will Rogers Airport. Please avoid going to the airport at this time. We will keep you posted.
“We have closed Will Rogers Airport at this time. If you are inside of the airport, shelter in place until advised otherwise.”
And Will Rogers Airport tweeted: “All arrivals/departures suspended until further notice. @OKCPD continues to investigate.”