A man in a subway tunnel was fatally struck by a 2 train Friday morning on the Upper West Side, police said.

The man, who police said appeared to have been in his 50s, was already on the tracks when he was hit around 10:30 a.m. by a northbound No. 2 train between the West 86th Street and West 96th Street stations, police and the FDNY said.

The victim, who police said appeared to have been homeless, was pronounced dead at the scene, an FDNY spokesman said.