Four people, including two young brothers, were found slain in an apartment on Monday, police said.
The boys' father found the bodies when he went to the apartment to check on them, Raytown Police Capt. Ted Bowman said. A woman believed to be their aunt and a man were also found slain, he said.
A baby 12 to 18 months old who was not related to the boys was found unharmed, Bowman said.
"It's a tragic case," he said. "There are four people dead in an apartment. We don't know why."
Police had no suspects.
Some neighbors said they thought they heard gunshots Monday morning.
"Before we can establish that there is somebody running around who has done this, we have to determine what it is we are dealing with," Bowman said.
Investigators were trying to confirm the identities of the dead and their relationship to one another.
Police said the boys were picked up from their mother's home Sunday night, possibly to be baby-sat.
Raytown is 10 miles southeast of Kansas City.
