Portland police are investigating an explosion behind a Southwest Portland apartment complex, beside Markham Elementary School.
No injuries were reported.
A secretary at Markham Elementary School said she and others in the office heard the explosion, but didn’t have any idea what caused it.
Police were called to the Terri Lee Manor apartments at 10625 S.W. Capitol Highway at 12:36 p.m. The explosion occurred in the back parking lot of the complex and damaged two cars, police said.
The Metropolitan Explosives Disposal Unit responded, and brought in a bomb squad robot to help investigate.
Markham was placed on precautionary lockdown, but all students were safe.
“We do know it was a device of some sort,” said police spokesman Sgt. Pete Simpson. “These types of incidents are pretty rare for a device to be detonated.”
Police said they don’t know if the device was inside or outside the vehicles. They also don’t know the motive.