A cleaning crew made a grisly discovery — skeletal remains — in a Brooklyn home Wednesday, police sources said.

The cleaners were inside the home on Skidmore Lane near Avenue J in Canarsie about 11:50 a.m. when they found the remains, believed to be human, on a bed covered by a sheet or a blanket, the sources said.

A man in his 70s and his mother, believed to be in her 90s, had been renting the space, according to sources.