A man lost part of his hand this morning in a firecracker mishap inside a home in the Penn-Knox section of Germantown.

The 54-year-old man remains in stable condition at Albert Einstein Medical Center after the 4:05 a.m. incident on Queen Lane near Greene Street, said Officer Jillian Russell, a police spokeswoman. The man reportedly was holding an M-80 firecracker when it went off in his hand.

The Bureau of Alcohol, Tobacco, Firearms and Explosives is investigating, Russell said.