A series of small fires were set around Olympic High School in Bremerton early Thursday.
Central Kitsap fire investigators said the fires are considered arson. Anyone with information is asked to call 360-337-4442.
At least five small fires were set across campus. The fires did minimal damage to school buildings.
Two school vans parked outside the main building endured the worst damage. The vans are used to transport special needs students.
Another fire was set outside a special needs classroom. Investigators have not said the connection between those two specific fires is significant.
Kitsap County Sheriff's deputies said garbage cans, ticket booths and brush were also set on fire.
Olympic High School Principal Bob Barnes said classes will continue as normal Thursday.