Phoenix police are investigating the deaths of three young children after their bodies were found early Thursday morning, PEOPLE confirms.
At around 2 a.m., police responded to a 911 call made by a man who said his sister tried to lock him out of his house before locking herself in a bathroom, Sgt. Trent Crump of the Phoenix Police Department told members of the media at a press conference.
According to authorities, the brother arrived home from work and found his sister in the garage talking about religion and how she “found the answer.”
The woman then locked her brother out of the home. When the man broke into the home, he saw his sister was suffering from several serious stab wounds to her neck and abdomen that appeared to be self-inflicted.
The man told police while he was calling 911, his sister, who is believed to be pregnant, allegedly tried to drown herself in the bathroom.
Police arrived on the scene and treated the woman for her wounds. She was transported to a local hospital in critical condition. She is expected to survive, Crump said.
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While treating the woman, police learned she had three sons: a 2-month-old, a 5-year-old and an 8-year-old, Sgt. Crump said.
Officers entered the home and made the “grim discovery” of finding the bodies of the 5-year-old and 8-year-old hidden in a bedroom closet, Crump said.
Upon further inspection, officers uncovered the body of the 2-month-old in a suitcase in the same bedroom closet. All three children had been stabbed multiple times, police report.
The mother-of-three had apparently moved back to Phoenix to live with her brother before giving birth to her youngest son, local media report.
Authorities have not identified the mother, 29. The motive for the murders is still unknown.