The Missoula city fire department responded to a structure fire early Friday morning believing someone was inside the burning building.

Assistant Fire Chief Jeff Brandt says crews responded at about 3:30 Friday morning and after crews searched the burning home, they found no one at home.

Brandt says one firefighter nearly fell through the burning floor, but was rescued by fellow firefighters before he sustained any injuries.

Brandy says he estimates the home suffered at least $50,000 in damages, and a fire investigator is at the scene attempting to determine the cause of the blaze.

Assistant Missoula Fire Chief Jeff Brandt