BROOKLYN - Cops are searching for a sex assault suspect after another woman was attacked in Park Slope on New Year's Eve.

According to authorities, the 23-year-old victim was grabbed from behind on 19th Street and 4th Avenue. They say the man ran off when the woman's boyfriend confronted him.

Many say they fear an alleged serial groper has returned after a string of similar attacks plagued the area through the end of October.

However, cops believe this to be an isolated incident and the special victims squad is investigating. Anyone with information should call Crime Stoppers at 1-800-577-TIPS.