BROOKLYN - Police say the man accused of attacking and robbing another man with a hammer inside a subway station has performed this act twice before.

The most recent attack occurred at the Fulton Street and Rockaway Avenue stop in Brownsville Wednesday morning. Police say the suspect approached a 32-year-old man from behind, hit him in the head with a hammer and demanded money. The victim handed over cash and the suspect took off.

The victim was taken to Brookdale Hospital, where he was treated and released.

Investigators now say the attack could be related to two previous incidents -- one at the same station on May 4, and the other, a day later in Queens.

Police say the suspect is about 5 feet 10 inches tall and weighs between 130 and 150 pounds.

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