The incident began Saturday morning when a 28-year-old woman was exiting the 45th Street subway station near 4th Avenue.
The suspect followed the woman from the subway station to her apartment building nearby and continued to touch himself, making sexual comments towards the victim.
He then grabbed her by the neck, continuing to touch her, and then hit her several times on the face and body.
The suspect fled on foot west on 3rd Avenue.
The victim was taken to New York University’s Langone Hospital in Brooklyn.
Anyone with information about the incident is asked to call the New York City Police Crime Hotline at 1-800-577-TIPS (8477) or in Spanish 1-888-57-PISTA (74782). The public can also send their advice by visiting the CrimeStoppers website at https://crimestoppers.nypdonline.org/ or Twitter @NYPDTips. All calls are strictly confidential.