The Solano County coroner's office confirmed Thursday afternoon that two 3-year-old girls found dead in a burning Fairfield apartment Tuesday night died of multiple stab wounds and cutting wounds.
The girls were identified as Tori and Lily Ball. One of the girls was stabbed in the abdomen, Solano County sheriff's Lt. Gary Faulkner said.
The autopsies were completed Thursday.
Their mother, Monica Christine McCarrick, 28, allegedly cut herself and the girls before setting their North Texas Street apartment on fire, Fairfield police said.
McCarrick has been arrested for the girls' murders and is expected to remain at John Muir Hospital through the weekend, Fairfield police Lt. Darrin Moody said Thursday afternoon.
Firefighters responded to the third-floor apartment at the Summit in Paradise Valley complex at 3001 N. Texas St. around 10:40 a.m. Tuesday when a water sprinkler triggered an alarm.
Several neighbors tried to get into the apartment when they smelled smoke and saw flames, but the front door appeared to be blocked by a heavy object such as a sofa, they said.
Fairfield police said the front and siding glass doors and window of the apartment were locked.
One of the would-be rescuers reported seeing a bloody knife or sword inside the apartment. Police have not disclosed any information about the weapon used in the stabbings or any potential reason for the tragedy.
Some neighbors, however, said they found it odd that McCarrick parked her white Nissan Versa across three parking spaces in a carport Monday. The car remained there until Tuesday morning.
Another neighbor said she saw McCarrick sitting alone in the car.