Police seek a man for questioning for forcible touching after he allegedly grabbed a Staten Island woman. (NYPD)

STATEN ISLAND, N.Y. - A Staten Island woman was groped in Grand Central station last month, and police released video showing the victim chasing down and repeatedly hitting the man sought in the incident.

At around 2 p.m. on Aug. 31, Chantal Castanon, 26, was walking down the stairs in the 42nd Street station when an unidentified man suddenly grabbed her buttocks, according to an NYPD spokesman.

"It was such a firm grip, I still felt him and he was all the way over there already, " Castanon told NBC New York.

Authorities seek a Hispanic man for questioning in connection to the incident, according to a written statement from the NYPD Deputy Commissioner of Public Information.

Police released surveillance video showing the woman chase the individual police are seeking and punching him as he attempts to run away.

"I didn't even think about it," she told NBC. "I just went after him and hit him, and I kept hitting him.

"I still was willing to take whatever punches or whatever he was willing to throw back at me," she said in the NBC interview.

Police said the man sought for questioning is between 20 and 30 years old, 5-foot- 6 or 5-foot-8, about 225 pounds and was wearing glasses, a green shirt, black shorts and black sneakers.

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then entering TIP577.

All calls are strictly confidential.