Police say two women and two children have been found shot dead in a trash-filled Washington-area apartment that had no running water.

Prince George's County, Md., police say the amount of trash is hindering the investigation of the bodies found in the makeshift apartment above a detached garage at a home in Riverdale.

The victims were two women in their late 30s, three-year-old girl and five-year-old boy.

Officers found the bodies early Friday after responding to a call from someone at the property who reported an assault. Police wouldn't say how the victims died.

Police Chief Roberto Hylton said whoever killed the victims may have known them, and the slayings attack appeared to be "personal" rather than random.