WASHINGTON — Prince William County police are searching for a man who attempted to sexually assault an 18-year-old woman in a Woodbridge park Thursday.

Around 4:20 a.m., an 18-year-old woman was walking in a park in the area of South Park Court in Woodbridge when she was approached by a masked man. She hit the man before running away, police said.

The man chased the woman, grabbed her from behind and forced her to the ground, according to police. The suspect removed part of her clothing, police added.

The victim was able to fight off the suspect and yelled for help. The suspect then fled the area, police said.

The woman was not injured.

Police responded to the area shortly after the incident, using K-9 units and a helicopter in a suspect search. However, police could not locate the suspect.

He is described as a 6 foot, 1 inch tall man with a thin build — weighing about 150 pounds. He was last seen wearing a dark-colored ski-style mask, gloves, dark pants and a dark-hooded jacket.

Anyone with information about the case can contact police at 1-866-411-TIPS, text “PWC” plus your information to 274637 or submit a tip online. Tipsters remain anonymous and can earn up to a $1,000 reward.

Below is a map with a location near the incident:

[google_map latitude=”38.638402″ longitude=”-77.347253″ zoom=”13″ height=”300px” location_label=”Attempted sexual assault”]