The incident occurred around 10:30 a.m. Saturday (local time) at the Fulton Street station at Chambers Street.
Witnesses told officers that the woman and her boyfriend had been arguing before she was pushed. The woman, who has not been identified, was taken to the hospital and lost both feet. Shortly after the incident, an unidentified man died after being hit by the subway at Seventh Avenue and West 53rd Street in Midtown. Police do not believe the two incidents are related.