Crime scene
Police in St. Louis say five people have been discovered slain in an apartment building.

St. Louis County Police confirmed Saturday afternoon in a news conference posted to the department's Twitter page that all five people killed were adults. Police would not give the names, ages or genders of the five people killed, nor disclose how they believed they had been killed. Police Chief Jon Belmar said only that investigators were certain they were victims of homicide.

Police say the group and a sixth person had been at the apartment Friday night. Police say the sixth person left sometime overnight and returned around noon Saturday to find the bodies.

Belmar said no arrests had been made and asked for information from the public, adding, "Somebody out there knows what happened."