Seattle police need help in looking for an attacker who assaulted and robbed a man in an alley in Belltown last month.

According to the Seattle Police Department, the attack happened on Aug. 24 around midnight in an alley in the 300 block of Lenora Street.

A 30-year-old Seattle man was walking alone when a man approached the victim from behind and struck him on the head.

Police released surveillance video Thursday of the incident, and it appears that the attacker hit the man with his fist.

The victim was knocked to the ground unconscious, and the attacker is seen rummaging through the victim’s pockets and flipping him over.

According to police, the attacker stole the victim’s wallet, cellphone and shoulder bag.

The attacker then fled and left the victim on the pavement.

Police said a witness saw the attack but was not in a position to help, so the witness called 911.

When officers arrived at the scene, medics were called to the location.

The victim was taken to Harborview Medical Center, and he sustained a broken jaw in the robbery-assault.

The man was treated at the hospital and was released, and he is currently recovering from his injuries.

Police described the attacker as a black man in his 20s, 5 feet 10 inches tall, 240 pounds and was last seen wearing a white T-shirt and a red baseball cap.

Anyone with information about the incident is urged to call 911 or Seattle Police Department Robbery Detective Tom Healy at 206-684-5537.  Anonymous tips are welcome.