Police in California say they believe a suicidal man caused a train crash on Wednesday on the outskirts of Los Angeles that killed at least 11 people. The man parked his Jeep on a commuter line before changing his mind and getting out of the vehicle, they said. Named as Juan Manuel Alvarez, the man is expected to be charged with murder. One train derailed after striking the Jeep, hitting another train on the opposite track. A freight train was also involved in the collision. Firefighters and medical teams searched the wreckage for survivors of the crash, which happened during the morning rush hour in the suburb of Glendale. Nearly 200 people were injured in the crash, some 40 of them critically. "For me, this is the worst train accident I have ever seen," said LA Fire Department chief Captain Rex Vilaubi. **How the crash happened*** The two double-decker Metrolink commuter trains were travelling near Union Station in downtown LA - one heading to Burbank and another from Moorpark - when the crash happened at 0600 local time (1400 GMT). Police Chief Randy Adams said Mr Alvarez, 26, of Compton, had been arrested following the crash. "I think his intent... was to take his own life but changed his mind prior to the train actually striking this vehicle," he told reporters. "He was very distraught and upset and realized that he caused a major disaster," the police chief added. Following the collision, one of the train carriages caught fire and another ended up on its side. One of the trains also hit a stationary Union Pacific freight train, said to be carrying gravel, pushing it off the tracks. **Investigation*** "I heard a noise. It got louder and louder," passenger Diane Brady, 56, of Simi Valley, was quoted by the Associated Press news agency as saying. "And next thing I knew the train tilted, everyone was screaming and I held onto a pole for dear life. I held on for what seemed like a week and a half, it seemed. It was a complete nightmare." Television pictures showed some of the 300 firefighters, in light rain, searching for survivors in smoking and overturned carriages. Helicopters and sniffer dogs were brought in to help to help find people trapped in the wreckage. Around 200 people were treated on colour-coded plastic mats set up close to the crash site to act as temporary triage areas. Officials said 100 people were taken to hospital and described it as a "very difficult morning". **PHOTO CAPTION*** Emergency workers and firefighter pull out two bodies of unidentified train commuters Wednesday, Jan. 26, 2005, in Glendale, Calif. (AP)