A woman between 50 and 60 years old and believed to be homeless was discovered dead on a subway train in New York City on Saturday, police say.

The New York Police Department says officers responded to a 911 call at a subway station where they found a woman on a train who was pronounced dead at the scene. Her cause of death is under investigation.

During a routine midday inspection over the weekend, a conductor discovered the dead body of a woman aboard a NYC subway train. Authorities reported that a woman believed to be between 50 and 60 years old and possibly homeless was found dead on a northbound F train at the Jamaica,

A 15-year-old subway surfer was found with head injuries after falling from a train in the Bronx, police sources said.

Kathy Hochul has added hundreds of NYPD officers to subway platforms and trains during overnight hours in an attempt to stop a rash of crimes that has shocked the city in recent months.Read more: 3 NYC teens getting $10,

New York City began increasing its police patrols on its subway overnight in an effort to combat crime on the transit system. Spikes in crime on the subway have put the system in the national spotlight as offenses ranging from petty theft to stabbings and murders have been publicized in the past year.