It is still unclear how seriously the injured people are.
"We know there are children among the victims," said Sheila Miller, a spokeswoman for the Bend Police Department.
Police were called to the shooting at a middle school at 1 p.m. local time. Shortly afterward, the perpetrator was reportedly shot dead inside the school.
"We have no confirmation of who shot the suspect. It could have been a passerby," Miller said.