The incident took place in Rockland County around 10:30 a.m., Friday, June 30 at Bear Mountain Bridge near Stony Point, police said.
Efforts are underway to retrieve the body, said Trooper Steven Nevel.
Additional information was not immediately available.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Poughkeepsie and receive free news updates.