Three children, all under the age of eight, were found Thursday stabbed to death by their mother, according to police.

Fox 10 Phoenix reported that the mother, who tried to kill herself, fatally stabbed a 2-month-old, a 5-year-old and an 8-year-old. 

Sgt. Trent Crump says the woman's brother called 911 after returning home late Wednesday and finding she had locked him out.

He said the brother eventually got into the home and found his sister with self-inflicted stab wounds. She then tried to drown herself in a bathtub while he got towels for her bleeding.

Police said the woman told officers arriving at the scene that her children were somewhere else. But police then found the boys — ages 2 months old and 5 and 8 years old — dead from stab wounds. At least two of the bodies were in a closet.

No identities were released.

The Associated Press contributed to this report