BART police are investigating the death of an elderly man who was found Friday afternoon on a train at San Francisco’s Powell Station, officials said.

A passenger summoned a BART employee to report an unresponsive passenger sitting in the seat of a train heading from Pittsburg-Bay Point to San Francisco International Airport, agency spokeswoman Anna Duckworth said.

The employee called paramedics, who declared the man dead at the scene. Police have determined there was no evidence of foul play, officials said.

The train was taken out of service and sent to a yard for investigation, Duckworth said. Crews will extract video from the train’s cameras for police to review.

Regular BART service, which had been delayed for about 20 minutes, resumed at 2:35 p.m. BART reported lingering 20-minute delays in the Daly City, Millbrae and SFO direction.

Michael Cabanatuan is a San Francisco Chronicle staff writer. Email: mcabanatuan@sfchronicle.com Twitter: @ctuan