Deadly rampage creates chaos at LAX A composed, solitary gunman shot his way into Los Angeles International Airport on Friday morning, killing a transit security screener and injuring at least one more before being wounded by police and taken into custody. The incident was over in less than 10 minutes but caused chaos at the world's sixth-busiest airport and disrupted thousands of flights across the nation. The suspected gunman was identified as Paul Anthony Ciancia, 23, a New Jersey native who lives in Los Angeles. Authorities declined to discuss the gunman's motivation publicly. But a law enforcement official told The Times that a note was found on the gunman expressing "disappointment in the government" and noting that he had no interest in hurting "innocent people." Ciancia also sent a sibling a text message last week suggesting that he was prepared to die, officials said. It appears the gunman targeted Transportation Security Administration agents, who are not armed. Authorities said he approached several people cowering in the airport terminal, pointed his gun at them, asked if they "were TSA" and then moved on without pulling the trigger if the answer was no. A witness said the gunman cursed the TSA repeatedly as he moved through the terminal. J. David Cox Sr., president of the union that represents 45,000 TSA flight screeners, called the shooting a "heinous act." The gunman was not a TSA officer and "never had been," according to the union, the American Federation of Government Employees. The TSA was created in the aftermath of the 9/11 terrorist attacks in an attempt to improve the safety of American transportation. Its screeners cannot make arrests and do not carry weapons. A former classmate of Ciancia's said Friday the suspected gunman was a loner and had been bullied at their private high school. "In four years, I never heard a word out of his mouth," said David Hamilton, who graduated with Ciancia from Salesianum School in Wilmington, Del., in 2008 and is now an editorial assistant at a publishing firm in Philadelphia. He kept to himself and ate lunch alone a lot. I really don't remember any one person who was close to him. Officials did not immediately identify the 40-year-old screener who died - the first TSA officer killed in the line of duty. In all, seven people were injured. Six were taken to area hospitals. It remained unclear if the gunman and the slain TSA officer were included in that total. All of those injured were adults, hospital officials said. Some were not shot but suffered what authorities called "evasion injuries," sustained as they attempted to run. At 9:20 a.m., the gunman entered the third of LAX's nine terminals through the main door, pulled an AR-15 assault rifle out of a bag and "began to open fire," said Los Angeles World Airports Police Chief Patrick Gannon. The gunman walked up one flight of stairs, to the entrance of the security checkpoint, where, officials said, he shot at least one of the TSA officers. He then entered the airport itself, walking with determination past a candy shop, a newsstand and a bookstore. An airport police officer and a sergeant engaged the gunman in a brief gunfight near a food court. "They hit him multiple times before he went down," said one law enforcement source. A witness said the gunman was wearing a bulletproof vest. As the gunfire echoed through the terminal, panic erupted and screams ricocheted down the corridors. Travelers and employees crawled on the floor and ducked behind planters and advertising kiosks. Passengers tripped over one another and abandoned baggage as they barreled backward through the security check. Jonathan Paul, 36, of Santa Monica looked up from a newsstand and saw a wave of terrified people racing toward the main entrance. He said some were shouting "Go! Go! Some travelers were halfway through security when the shooting erupted and raced for the doors with their shoes and belts in hand. Others, guided by no one and unsure where to go, pushed open emergency exit doors and fled the terminal. Some raced across tarmacs and some attempted to seek shelter on planes that were still taxiing. Brian Adamick, 43, who was preparing to board a Spirit Airlines flight for Chicago for his brother's wedding, was among those who escaped the terminal by running onto the tarmac. Before long, buses arrived to evacuate passengers. A wounded TSA officer with a bloody ankle boarded one of them. "I got shot," the officer told Adamick. I'm fine. Stephanie Rosemeyer, 26, was awaiting a flight to Chicago when she saw people running toward the exits. She stood up in search of the source of the commotion, she said, and found herself looking directly into the gunman's eyes. She took a step and heard the gunman curse the TSA. She was among those who raced onto the tarmac and was evacuated by bus. "There was no one directing anything," she said.