BROOKLYN - Police are searching for a man who they say attempted to rob a woman and then sexually assaulted her in Park Slope yesterday.

Investigators say the 22-year-old victim was alone at her job when a man wearing a ski mask came in and demanded cash. When she told him she didn't have any money, he raped her, police say. The suspect then fled the scene.

Police have released the security video of the man they believe is behind the attack. The suspect is described as being about 5 feet 5 inches tall and weighing 160 lbs.

Anyone with information about the assault is asked to call Crime Stoppers at 1-800-577-TIPS.