Update November 1, 2013 15:15 EDT

A camouflage clad gunman opened fire at LAX. He left Transportation Security Administration agent dead  and and wounded 3 others according to NBC News.

The gunman  was shot and secured by cops at about 9:30 a.m. local time, authorities told CBS. It is still under investgation as to how the gunman managed to carry a gun got pass airport security.

The LAX Twitter account confirmed the incident and that  gunman was arrested. Fox News details that the suspect is connected in some way to TSA.

"After the initial burst of gunfire and hiding, people started jumping over one another, jumping off chairs, pushing each other," Fox Sports reporter Bill Reiter said on Twitter. "Chaos & fear."

Live aerial footage of the scene previously showed hundreds of evacuated passengers crowded in and around the terminal. Emergency crews appeared to be working with patients on stretchers, and police armed with weapons swarmed the area.

"I heard popping and everybody dropped to the ground," evacuated passenger Robert Perez told CBS.

Tory Belleci of Discovery Channel's Mythbusters show was on his way to Philadelphia when the shooting occurred.

"I was in Terminal 3 when we heard the shots," he told HuffPost Crime. "At first it didn't register. Then, everybody started panicking and running. We ran toward terminal, but the gate was locked. We were trapped. It felt like an eternity ... We heard the shots coming from the elevator. One person near me said the shooting happened in the common area.

"A person told me he saw the shooter coming up the escalator. He was [allegedly] a white man in a white shirt." Among those who disclosed details of the incident were Chief Patrick Ganon of Los Angeles Airport Police, Gina Marie Lindsey LAWA Executive Director, and Chief Charlie Beck of LAPD.

Sources: NBS Breaking News, HuffingtonPost, cbsLA