Can we draw the following hypothesis from the context? 

Context:

KALAMAZOO, MI -- Heavy fire seriously damaged a Burdick Street home near Bronson Methodist Hospital on Saturday, April 7. The fire was reported about 1:40 p.m. at 724 S. Burdick St. The first firefighters at the scene reported flames coming out of a back porch of the house and indicated the house was fully involved with fire. There were no reports of injuries and fire authorities later called for the American Red Cross to respond to the scene to help displaced residents. It wasn't immediately clear what caused the fire.

Hypothesis: The American Red Cross didn't know how the fire was started
Yes