BEAVERTON -- Fire broke out shortly before 6 a.m. at Highland Park Middle School, at 7000 SW Wilson Avenue.
Sky8 was flying over the school and flames could be seen coming from a former mobile classroom that has lately been used for storage.
Crews from Tualatin Valley Fire & Rescue responded to the fire. Power lines caused some initial issues with crews fighting the flames, said TVF&R spokesman Pete Scott. Flames were out within 15 minutes.
"It's completely destroyed. It's sad that this could impact the school or someone could impact the school this way, I don't know what happened," said principal David Nieslanik.
He said he was watching NewsChannel 8 at Sunrise and saw there was a fire at his school.
"I was sort of sad because I've been here and I have relationships with the teachers," said 8th-grader Micah Maggio. "They're nice people. It's a school you don't want to get burned down."
The cause of the fire was undetermined but investigators said foul play was not suspected. They said it started in the attic, in an area used for storing desks, chairs, drama props and paperwork.
The fire did not affect class schedules Tuesday. Damage was estimated around $100,000.