The flames extended into the walls and up to the third floor, according to Deputy Fire Chief John Gelinas.
The cause of the fire is still under investigation.
"Right now there's nothing that indicates arson," Gelinas
said three Cambridge
firefighters were sent to the hospital, one suffering from a sprained ankle, one with a back injury, and another with a cut hand.
None of the injuries were life-threatening.
The estimated damage is $50,000.
said while at the scene, firefighters were able to rescue a number of pets from the home including a hamster and "at least two ferrets."