PORTLAND — Portland police are searching for a suspect who attacked a man with a brick then rifled his pockets near Portland Street Wednesday afternoon.

Police say a 46-year-old Gray man was hit in the head with a brick at 4 p.m. behind 45 Portland St. The suspect went through his pockets but stole nothing, police said.

A witness saw the attack, called 911 and yelled, frightening off the suspect.

The suspect is described as 5-foot-11, white, thin, in his late 20s or early 30s, with short hair or a shaved head. He was wearing wire-rimmed glasses, police said.

The victim was taken to Maine Medical Center where he was treated for injuries that were not serious, police said.