TUALATIN, Ore. -- A 17-year-old boy became the victim of a strong-arm robbery in Tualatin on Wednesday night.

A man hiding in the bushes on Southwest Sagert and Martinazzi avenues jumped out and attacked the teen just before 5:30 p.m., police said.

Officers said the attacker hit the boy several times and stole his backpack.

"He kept on pounding me over and over and I didn't even realize what was going on until I was on the ground," said the teen, who didn't want to be identified.

The teen suffered minor facial injuries and didn't require medical attention. He said he had artwork in his backpack that was irreplaceable.

"When I was finally available to get up, I yelled at him and said, 'Look, you can take everything you want, I just want my sketch book,'" the teen said.

The robber is described as 18 to 20 years old with crew-cut-style hair, acne and a facial piercing. He wore blue jeans and a white T-shirt at the time of the robbery.

Police searched the area for the attacker, but they couldn't find him or the stolen backpack.

Anyone with information is asked to call Tualatin police at 503-691-4800.

Teen Attacked In Tualatin Robbery