OREGON CITY, Ore. - A couple of teenage boys might have thought it was fun to throw rocks and cinder blocks onto Highway 99E, but a driver whose car was hit is not laughing, and police are issuing a strong warning that someone could have easily been injured or killed.

The incident happened between 4 a.m. and 6 a.m. on Saturday, just south of Oregon City.  Two 15-year-old boys are accused of throwing rocks and cinder blocks onto Highway 99E from a cliff, damaging a number of vehicles. 

David Aubin, an aircraft mechanic, was driving to work Saturday morning when he ran over cinder blocks and stones pelted his car.

"You could see them on the streetlight and they actually arced upward and came down on the front of the car," he said.

Aubin quickly drove up a street and found where the rocks were coming from.  He said the kids who threw the rocks ducked into a nearby home.

Michael Orren told KATU News his 15-year-old brother is one of the kids responsible and he hopes his brother learns a lesson from this. "He doesn't need to be doing this," he said. 

Lt. Gregg Hastings with the Oregon State Police warns that throwing rocks or other items into traffic is very dangerous. 

"People have been injured or killed by rocks that have hit or come through the windshield," he said. 

Hastings added that parents need to realize they can be held financially responsible for the actions of their children. 

Aubin had considered riding his Harley that morning, which could have spelled disaster.

"If they would have thrown anything at me, there is no way I could have kept my bike upright," he said.

Aubin hopes the kids learned their lesson. 

"They've got two choices - they can keep doing what they are doing and go the wrong way, or they can smarten up and do the right thing," he said.

Aubin said it will cost about $3,000 to repair his car.  Another woman whose car was hit said she got a $4,700 repair estimate. 

The two teenagers accused of throwing the rocks and cinder blocks face misdemeanor criminal mischief charges and their parents could end up having to pay for damages.  The boys were released to their parents until their court dates.

Police believe there may be more victims whose vehicles were damaged.  Anyone with information is asked to call Cameron Bailey, Recruit Trooper with the Oregon State Police, at (503) 731-3020, ext. 445.