JOHN M. HARRIS/AP
Authorities say a man who was fatally struck by a light rail train earlier this weekend was a transient with no fixed address who may have fallen off the platform.
The San Francisco Medical Examiner's office says 55-year-old Michael Mendez was killed by an outbound Muni train at the Powell Street station around 2:40 p.m. Saturday.
Authorities in response shut down four subway stations to investigate, causing delays for mass-transit riders heading to downtown San Francisco for the Chinese New Year parade.
The San Francisco Chronicle reports Mendez died at the scene. Police say a preliminary investigation suggests he fell.
A train operator who was injured while hitting the brakes on the train was taken to the hospital for non life-threatening injuries.