Shooting at LAX

Fire, rescue and police personnel gather at the Los Angeles International Airport, Nov.1, 2013.

A gunman walked into Terminal 3 at Los Angeles International Airport Friday morning and opened fire at a security checkpoint, killing a Transportation Security Administration officer and wounding at least three other people, law enforcement sources tell CBS News.

Read more: TSA officer killed, others hurt in LAX shooting

photo_2_of_gun_on_the_ground_must_credit_@Pascaljosh.jpg — @Pascaljosh via Twitter

A gun is seen on the ground inside the Los Angeles International Airport, Nov. 1, 2013.

Emergency responders are seen at the site of a shooting at Los Angeles International Airport's Terminal 3, Nov. 1, 2013.

Gun_on_ground_must_credit_@Pascaljosh.jpg — @Pascaljosh via Twitter

A gun is seen on the ground inside the Los Angeles International Airport, Nov. 1, 2013.

People stand on the tarmac after being evacuated from Los Angeles International Airport, Nov. 1, 2013, after shots were fired at Terminal 3, prompting authorities to evacuate the terminal and stop flights headed for the city from taking off from other airports.

Emergency responders are seen at the site of a shooting at Los Angeles International Airport's Terminal 3, Nov. 1, 2013.

People_on_highway_Twittermust_credit_@JosephKahn.jpg — Joseph Kahn via Twitter

The scene at Los Angeles International Airport after shots were fired at Terminal 3, prompting authorities to evacuate the terminal, Nov. 1, 2013.

Emergency responders are seen at the site of a shooting at Los Angeles International Airport's Terminal 3, Nov. 1, 2013.

Photo_from_twitter_scene_must_credit_Photojournalist_Eric_Kayne_from_Twitter.jpg — Eric Kayne via Twitter

The scene at Los Angeles International Airport after shots were fired at Terminal 3, prompting authorities to evacuate the terminal, Nov. 1, 2013.

Photo_from_Twitter_police_must_credit_@pascaljosh.jpg — @pascaljosh via Twitter

Police at Los Angeles International Airport after shots were fired at Terminal 3, prompting authorities to evacuate the terminal, Nov. 1, 2013.

Emergency responders are seen at the site of a shooting at Los Angeles International Airport's Terminal 3, Nov. 1, 2013.

Los Angeles LAX Airport Terminal Shooting Map — LAX

A map of Los Angeles International Airport

A police officer diverts traffic trying to enter the Los Angeles International Airport, Nov. 1, 2013.

Passengers walk with their luggage on a city street outside Los Angeles International Airport, Nov. 1, 2013 after shots were fired in Terminal 3, prompting authorities to evacuate terminals and stop flights headed for the city from taking off from other airports.

People wait on the tarmac at Los Angeles International Airport, Nov. 1, 2013.

People walk across the tarmac after being evacuated from Los Angeles International Airport, Nov. 1, 2013.

A police officer closes a road at the Los Angeles International Airport, Nov. 1, 2013, after shots were reporter in Terminal 3, prompting authorities to evacuate the terminal and stop flights headed for the city from taking off from other airports.

Passengers are directed outside Terminal 2 at Los Angeles International Airport, Nov. 1, 2013, after shots were fired prompting authorities to evacuate a terminal and stop flights headed for the city from taking off from other airports.

Passengers evacuate the Los Angeles International Airport , Nov. 1, 2013, after shots were fired prompting authorities to evacuate a terminal and stop flights headed for the city from taking off from other airports.

Police walk outside Terminal 3 at Los Angeles International Airport, Nov. 1, 2013.

Police, emergency response vehicles and officials are positioned outside Terminal 3 at Los Angeles International Airport, Nov. 1, 2013.

Passengers walk with their luggage leaving the Los Angeles International Airport, Nov. 1, 2013.