An armed passenger who barricaded himself in an Amtrak rail car outside Los Angeles Friday night -- forcing the evacuation of 187 passengers -- was finally apprehended after about eight hours after tear gas was released, police said early Saturday morning. 
 
 "Barricaded armed suspect on #AMTRAK train in custody after tear gas deployed. Area safe," tweeted the Los Angeles County Sheriff's Department's Special Enforcement Bureau at 2:19 a.m. local time. 
 
 Police were notified by Amtrak at 6:19 p.m. that passengers on board Amtrak # 790 -- traveling along the popular Pacific Surfliner route -- witnessed a passenger with a weapon, said Ramon Montenegro, a public information officer with the Los Angeles County Sheriff's Office Transit Bureau. 
 
 ABC-owned KABC in Los Angeles reported that the weapon was a gun, although police had not yet specified what the weapon was. 
 
 According to KABC, witnesses said the suspect appeared to be under the influence, or possibly had a mental health issue. 
 
 Train operators were instructed to pull the train into the station in Chatsworth -- located in northwestern San Fernando Valley in Los Angeles County -- and evacuate the train, Montenegro told ABC News. 
 
 When deputies arrived, the train was evacuated, with the exception of the car carrying the suspected armed passenger, who locked himself in. KABC reported that the train has also been isolated. 
 
 An Amtrak spokesman told ABC News, "Amtrak Train 790 -– the Pacific Surfliner service, operating from San Luis Obispo to San Diego –- is being delayed at the Chatsworth station for police activity. All 187 passengers and 5 crew have safely left the train and remain inside the Chatsworth station." 
 
 Amtrak provided buses to take the passengers to a new train elsewhere, but those who went were unable to take their luggage since it remained on the original train 
 
 There were no reports of shots fired. 
 
 Crisis negotiators and SWAT Team officers were dispatched to the station, Montenegro said. 
 
 Train traffic -- including both Amtrak and the regional Metrolink -- was temporarily stopped. 
 
 ABC News' Lucien Bruggerman, Anthony McMahon and Shelby Kimball contributed to this report. ||||| A possibly armed suspect was barricaded for hours inside an Amtrak train in Chatsworth Friday night, causing several evacuated passengers to be left stranded.Authorities received reports of a man with a gun inside Train 790, the Pacific Surfliner, at about 6:19 p.m. The train stopped at the Chatsworth and was isolated, according to the Los Angeles County Sheriff's Department.As of midnight, the suspect remained barricaded inside as deputies tried to bring the incident to a peaceful end.Dozens of passengers were left frightened - and stranded."Someone reported that he dropped a gun - likely was then reported to the train folks - and that's when things escalated," said passenger Allison Bird.Witnesses said the suspect appeared to be under the influence, or possibly had a mental health issue."I didn't know what was happening. I just saw two cops - one escorted us out and the other one had a shotgun and then they had, like, AK-47s out," said another passenger.Amtrak's Pacific Surfliner travels from San Luis Obispo to Santa Barbara, Los Angeles and San Diego.The incident is causing delays in other trains. Metrolink tweeted that its Ventura County Line 121 to Moorpark is stopped at Northridge. VC Line 119 to East Ventura had been delayed up to 45 minutes and VC Line 117 to East Ventura had also been delayed up to 90 minutes. VC Line 123 to East Ventura was held at the Van Nuys station.Check Metrolink's Twitter feed for the latest updates on train delays. ||||| Mitrak said he talked to a passenger who said he had been sitting in front of Palmer. Mitrak said the passenger told him that Palmer "was speaking loudly" and "sounded like he was on drugs." At one point, the passenger told Mitrak, he had turned around, thinking Palmer was talking to someone. But in fact had been talking to himself.
– An Amtrak train had to be evacuated outside Los Angeles Friday night due to a passenger with a gun, the Los Angeles Times reports. According to KABC, fellow passengers saw the armed man and alerted Amtrak personnel, who notified police. The man appeared to be intoxicated, on drugs, or having a mental health issue. The 187 passengers on board were evacuated at the station in Chatsworth, and the train was surrounded by officers from the Los Angeles Police Department, Los Angeles County Sheriff's Department, and Amtrak. The armed man barricaded himself in one of the train's cars, Good Morning America reports. He surrendered following an eight-hour standoff only after officers fired tear gas at him.