THE BRONX - Police have released surveillance video of a man who they say sexually assaulted a 27-year-old woman last weekend.

According to investigators, the suspect came up behind the victim on Westchester and Third avenues at around 3:30 a.m. Sunday. They say he was wearing a ski mask and punched the victim repeatedly.

The man is believed to be Hispanic, and between 25 and 30 years old with a thin build.