A train struck and killed a 57-year-old man in Fitchburg Saturday night.

The man, whose identity has not been revealed, was struck by a westbound Pan Am Railways train just west of the Fitchburg Commuter Rail station around 9:50 p.m.

Transit Police detectives and representatives of the Worcester County District Attorney’s Office are investigating the facts and circumstances leading to the incident. Foul play, according to authorities, is not suspected.