Updated

Four people, including two young children, have been shot to death in a Tulsa apartment and authorities say they're investigating the case as a triple murder-suicide. A 2-year-old child was discovered unharmed.

Tulsa police say a 35-year-old man fatally shot his estranged wife, their 5-year-old daughter and 3-year-old son before shooting himself.

Police say the shootings happened after the wife, who was 22-years-old, dropped off their children at his apartment Monday. She returned later that day with her roommate's 2-year-old daughter.

Authorities say the 2-year-old girl, who wasn't related to the alleged gunman, was in the apartment during the shooting but was not hurt.

The bodies were discovered early Tuesday. No names have been released, but Tulsa police said in a press release that the victims were from Guatemala.