PHOENIX (AP) — Authorities say a Phoenix woman has been arrested on suspicion of killing her three children. They were found dead inside the family home on Monday. Police say the 22-year-old mother, whose name has not been released, admitted to harming her three children. She was in the process Tuesday morning of being booked on three counts of first-degree murder. It was not known if she has an attorney. A relative who lives at the residence called police and officers found a 7-month-old girl, 2-year-old girl and 3-year-old boy. The children were pronounced dead after officers administered CPR and fire officials provided first aid.