Police have released surveillance images of three men accused of attacking and robbing a 70-year-old man in Flatbush.

The incident happened Sunday around 2 p.m. on Hillel Place.

Investigators say the 70-year-old man was sitting on a bench when a man came up and punched him in the back of the head.

After the man was punched from behind, police say the same suspect ripped a necklace from his neck, and ran to a white Nissan SUV with two other men who were acting as lookouts.

According to police, they then drove off.

The victim was taken to the hospital in stable condition to be treated for a laceration to his head.

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