2014-08-21 08:02:00 by Metro Networks, Inc.
(Portland, OR) -- Investigators are trying to find out what caused a fire on top of a high-rise building in downtown Portland. The blaze was reported around 12:30 this morning on the roof of the 15-story Yeon Building, on Southwest 5th Avenue near Alder. "The Oregonian" reports firefighters had the blaze under control in less than 20 minutes. No injuries were reported.