DEVELOPING: Police have surrounded Terminal 3 at Los Angeles International Airport Friday after an unknown incident prompted an evacuation of Terminal 3.
Details surrounding the incident were not immediately clear, but passengers reported being evacuated from the terminal sometime after 9 a.m. There were eyewitness reports of a shooting, but those reports were not immediately confirmed by Fox News. One witness said a person with a gun opened fire after getting through a security checkpoint.
Witness Brian Keech said he heard "about a dozen gunshots" from inside the security gate at Terminal 3.
The Los Angeles Times reports that one TSA agent was shot and the suspect was wounded.
Fire officials said they are responding to assist multiple patients with injuries and the city was placed on a tactical alert. First responders are at the scene, and a TSA agent was receiving treatment.
Bill Reiter, a writer for FoxSports.com, was at the scene and sent out a tweet: "When gunfire broke out there was a stampede people, all of us hiding under seats we didn't fit under, we burst through the door to outside."
Tory Belleci from the TV show "Mythbusters" tweeted: "Heard gun shots then everyone starting running for the door. Not sure if anyone was hurt."
The airlines that use the terminal are Allegiant Air, Frontier, JetBlue, Spirit, Virgin America and Virgin Australia.