Photo: An early morning house fire on B Street was quickly extinguished by Belmont Fire crews. (Credit Belmont Fire Department)

A house fire that broke out in a B Street duplex was put out without injuries to residents or firefighters early Thursday morning, Aug. 26.

Belmont Fire Department companies arriving at the scene at approximately 1:30 a.m. encountered a blaze in the kitchen of one of the condominiums and rapidly extinguished it confining damage to the room.

“Belmont firefighters confirmed that all residents had escaped by conducting a search of the entire duplex,” according to a press release from Belmont Fire Chief David DeStefano. “Firefighters also conducted smoke removal activities and monitored the occupancy to ensure the atmosphere was free of harmful products of combustion.”

Mutual aid came from the Cambridge, Arlington and Watertown fire departments.

The cause of the fire remains under investigation.