Officials have confirmed the killing of Gerardo Hernand, 39, a federal security agent in a shooting incident at Los Angeles International airport on Friday.
It was also confirmed that several people were injured including the killer of the federal security agent, Anthony Ciancia, who is in Police custody at present.
The Transportation Security Administration (TSA) said three of its staff had been injured, one fatally.
Air travel was disrupted nationwide because of the unfortunate incident.
The incident also caused chaos on the road making several passengers who arrived shortly after the incident walk several miles, pulling their luggage along with them because friends and families who should have come to pick them up couldn’t get through to the airport.
LA Airport police chief Patrick Gannon told reporters a “lone shooter” came into Terminal 3 at 9:20 local time (16:20 GMT).
The suspect “pulled an assault rifle out of a bag and began to open fire in the terminal” he said.
He then allegedly went to a security screening area and continued shooting.
“As you can imagine, a large amount of chaos took place in this entire incident,” Mr Gannon said.
Los Angeles Mayor said it was the first time a TSA officer was killed in the line of duty.
He lamented the fact that the authorities had to tackle the suspect who had more than 100 rounds of ammunition in his possession.
Associated Press gathered from a law enforcement officer that Mr. Ciancia was shot in the mouth and leg by two airport police officers.
According to US media, the alleged gunman approached potential victims asking if they worked for the TSA, and spared them if they said no.
Little is known about the suspect apart from the fact that he was carrying a note that expressed ant-government views.
The suspect’s family in New Jersey told police on Friday they had received a text message from him saying he planned suicide, report US media.
“Their younger child got a text message from Paul [Ciancia] stating that there were some comments in there about his wellbeing and he wanted to possibly take his own life,” a New Jersey police chief, Allen Cummings, said.
Mr Cummings said he called Los Angeles police, who sent officers to Mr. Ciancia’s apartment in the city.
President Barack Obama expressed concern about the shooting, but said he would leave law enforcement to talk about it.