(Newser) – 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.