Catherine Murch

(UPI/Bill Greenblatt)

Updated 5:36 p.m. with additional details from press conference.

Investigators say they've determined that a suburban St. Louis woman killed her two young children and herself in the family's Glendale home.

Friday's announcement followed autopsies and several days of investigation by the St. Louis Area Major Case Squad.

Lt. Tim Fagan said at a news conference that 42-year-old Catherine Murch had a history of mental health issues.