The 35-year-old woman was walking in Brooklyn's East Williamsburg just after 8 p.m. Monday when she noticed the man following her, the New York Police Department (NYPD) said. She turned the corner onto Stagg Street and he continued in tow.
Footage shows her walking alone with the stranger only feet behind her. She stops briefly to let him pass.
The video then cuts to the woman walking again when the man runs up and tackles her from behind, forcing her to the concrete. He is then seen on top of the victim for several seconds before she appears to hit him with something, prompting the attacker to get up and run off, the footage shows.
Police said the man reached into the victim’s shorts and "forcibly grabbed her buttocks." The woman was not physically injured and refused medical treatment.
Meanwhile, investigators are still looking for her attacker, whom they described as being 5-foot-5 and approximately 165 pounds with black hair.