Police on Thursday were investigating the deaths of three family members found dead inside a Los Angeles home.

A man coming to check on relatives Tuesday night in the Leimert Park neighborhood saw through a window what appeared to be three bodies on the floor, police Capt. Peter Whittingham said.

The man went inside and found his father, grandmother and her husband dead with trauma to their heads, Whittingham said.

The victims' names have not been released.

A preliminary investigation found no immediate signs of a break-in or robbery, officials said

No suspects have been named, but detectives interviewed a person of interest, Officer Tony Im said. He didn't know the person's relationship — if any — to the victims.