Power lines? Old embers? Arson? Investigators, experts, amateurs look for cause of L.A. fires

"There's a lot of misinformation floating around, and a lot of people want answers - which is understandable. And we will provide those answers," said Ginger Colbrun, a spokeswoman for the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives."

"We have to get additional people here and investigate," Colbrun continued, highlighting the need for thorough inspection and the complexity of determining the causes of the fires, especially when investigations can take months."

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