Victims reported a male threatening them with a knife aboard a Fremont bound train. Officers responded to intercept the train at the Ashby Station. The male off boarded the train at Ashby and then set his shirt on fire. The male left the platform and a train operator extinguished the fire. Officers located the male and took him into custody at gun point. A records check showed the male had two arrest warrants (totaling 15K) for possession of narcotics. The male was booked at the Santa Rita Jail for brandishing a weapon, negligent burning, terrorist threats and warrants. 1607-5170 L22.