Blast Tied To Tofu Pan Puzzles Portland Officials (VIDEO)

11/29/2011 12:16 am ET

PORTLAND, Ore. -- Fire investigators in Portland, Ore., are trying to figure out how cleaning a pan of tofu could cause an explosion that broke out a window and resulted in $15,000 of damage.

Corah says the 25-year-old woman could tell investigators only that the hot pan "flashed" as she rinsed it. She suffered a slight hand burn.

Corah says investigators found no evidence of a fire, and natural gas is not suspected. He says investigators are calling other West Coast fire agencies for advice.