(Rochester, NH) - Rochester police are trying to identify a man who assaulted a woman outside the Planet Fitness studio on North Main Street last week.

Rochester PD

The suspect was captured by surveillance cameras as he approached the victim as she left work around 10 p.m. on June 12.

The suspect approached the woman from behind and hit her 39 times, threw her to the ground and kneed her in the head, according to police. The victim suffered only minor injuries in the assault, police said.

A video of the suspect assaulting the woman can be seen here.

The man then left the area in in a light-colored Ford Fusion or similar vehicle, police said.

There are reports the man may have sat in his car in the parking lot for a number of hours before the assault occurred.

Anyone with information is asked to contact Rochester police.