Investigators say the 4 Alarm fire Monday afternoon in Northeast Portland was intentionally set.
It started at a former golf driving range near Northeast 82nd and Siskiyou.
Investigators aren't saying how the fire was started. They are asking for witnesses or people with video from near the time the fire started to contact them through CrimeStoppers.
No one was hurt. One business, a town house and 50 vehicles were destroyed by the fire.