An Amtrak train struck and killed an 18-year-old Bucks County man early yesterday near the Croydon station in what was ruled a suicide, authorities said.

The man, who lived in Croydon, was pronounced dead at the scene. He had left behind notes that made it clear he committed suicide, said Joseph Campbell, the county coroner.

No injuries were reported on Amtrak Train 639, which had 40 passengers and crew aboard when it struck the man at 12:20 a.m., Amtrak spokesman Steve Kulm said.

The train departed New York City's Penn Station about 11:15 p.m. and was due in Philadelphia at 12:40 a.m. After the accident, the train was held in Croydon for two hours. - Sam Wood