What white powder caused these lines? Firefighters in Edmonds, Washington didn't take any chances and sent in a hazardous materials handling team:
"It turns out the white powdery substance is, in fact, flour," Snohomish County Fire District 1 spokeswoman Leslie Hynes said.
A witness told firefighters that a couple of crows were to blame.
The woman was going out for a jog when she noticed the black birds dragging around the bag of white flour.
"She took it away from them, put it in a garbage can and kept running," Hynes said. "Two crows and a two-alarm hazmat incident."
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