ABC News August 23, 2019

Woman arrested for allegedly killing her baby, teen daughter: Police

WATCH: Teen, baby girl found dead; mom person of interest

A California mom has been arrested for allegedly killing her 4-month-old and 14-year-old, authorities said.

Linda Nguyen, 47, was arrested for the deaths of her two daughters, who were found this week in their garage in Ontario, about 40 miles east of Los Angeles, the Ontario police said on Thursday.

"She willingly provided a statement that confirmed she acted alone in the deaths of her two children," Sgt. Bill Russell told ABC News on Friday.

Terry Pierson/AP
Ontario Police stand outside the scene where two children, an infant and a teenager, were found dead with their mother, who was unresponsive, at a home, Aug. 20, 2019, in Ontario, Calif.

The gruesome discovery was made on Tuesday by the children's father when he arrived home, prompting him to call police, Russell said at a news conference on Wednesday.

(MORE: 'Distraught' dad finds baby, teen daughter dead in garage; police say mom is a suspect)

Nguyen, who was found unresponsive at the home on Tuesday, allegedly left suicide notes -- one in the house and one in the car -- saying she intended to kill the children and herself, Russell said.

Terry Pierson/The Orange County Register via AP
An Ontario Police officer interviews a neighbor sitting in his garage next door to a home where two children, an infant and a teenager, were found dead with their mother, who was unresponsive, Aug. 20, 2019, in Ontario, Calif.

"Nguyen remains at a local hospital but will be booked at West Valley Detention Center on two counts of murder once she has been medically cleared," police said on Thursday.

She's expected to be released from the hospital in the next few days, Russell said.

Ontario Police Department
OPD has placed Linda Nguyen, age 47, under arrest for the deaths of her two daughters.

Russell called the case a "horrible tragedy."

He said "the mother was dealing with depression" but he did not elaborate or say if she was being treated.