CHESTER, Pennsylvania (WPVI) -- Three firefighters were injured while battling a fire in Chester.
The fire broke out just after 12 a.m. Sunday at a home on Baker Street between 12th and 13th streets.
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Crews found two homes on fire on both the first and second floors.
One of the firefighters was hurt when he fell through a floor, but no one suffered life-threatening injuries.
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Investigators are working to figure out what caused the fire, and say they're still not sure if anyone was inside at the time.