LAKE OSWEGO, Ore. (KOIN 6) — An explosion ripped through a Lake Oswego restaurant late Saturday night, blowing front windows into the street and starting a fire off the main restaurant area.
The explosion at Scratch Restaurant, 149 A Avenue, happened around 11:30 p.m., authorities said. Firefighters controlled the fire within 10 minutes and checked nearby businesses for any damage. The fire was contained inside the restaurant, officials said.
The restaurant was empty at the time and no one was hurt.
Fire investigators said late Sunday afternoon that they were unable to “absolutely determine a cause of the fire.” However, the investigators also said a ceiling fan was found that “may have contributed to the fire,” but at this time, the cause is listed as undetermined.
The cause of the explosion was listed as a possible smoke explosion.
“A smoke explosion occurs when the products found in smoke mix with air, creating a flammable mixture. When this flammable mixture finds an ignition source, it creates an explosion similar to what happens when a cloud of gas reaches a ignition source,” said Battalion Chief David Morris.
Investigators said there was no evidence that anything from the kitchen was involved in the fire or subsequent explosion.
Authorities have turned the building over to the owner, and it is believed that there may be about $50,000 worth of damage.