The Boston Police Department reports it is looking for a man who exposed himself to a woman on Centre Street around 5:30 a.m. Wednesday and then grabbed her buttocks.

Police say the man fled after the woman smacked him with a cane and a passing motorist scared him off.

Police describe the guy as a light-skinned black or Hispanic male, 5'10", about 200 lbs., with short black hair and wearing a gray hoodie, blue jeans, tan Timberland boots and read and blue plaid boxer shorts. He was driving a newer gold car.