Authorities have identified the three young children who were killed in a gruesome slaying in Los Angeles over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail on Monday.

The autopsies of 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, were pending on Monday, coroner's records said. Their mother, Liliana Carrillo, is being held on $60,000 bail in the Tulare County jail on second-degree robbery charges.

Click to Gallery

Photos of three children are placed at a memorial with candles, flowers and balloons at the scene of a crime at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Authorities have identified the three young children who were killed in a gruesome slaying in Los Angeles over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail on Monday.
Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

A GoFundMe fundraiser for the father had garnered more than $30,000 in donations by Monday afternoon.
A woman leaves flowers at a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

He said Carrillo was supposed to turn over the kids to him on Sunday.
Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Authorities said police initially received reports that Carrillo was driving her car and heading north on Interstate 5 when she got in an altercation in the Bakersfield area. She abandoned her car and carjacked another vehicle, police said.
Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)
Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)
More Images
Photos of three children are placed at a memorial with candles, flowers and balloons at the scene of a crime at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Authorities have identified the three young children who were killed in a gruesome slaying in Los Angeles over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail on Monday.

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

A GoFundMe fundraiser for the father had garnered more than $30,000 in donations by Monday afternoon.

A woman leaves flowers at a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

He said Carrillo was supposed to turn over the kids to him on Sunday.

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Authorities said police initially received reports that Carrillo was driving her car and heading north on Interstate 5 when she got in an altercation in the Bakersfield area. She abandoned her car and carjacked another vehicle, police said.

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

A memorial of photographs, candles, flowers and balloons grew outside the apartment complex Monday, days after the children’s grandmother returned home from work Saturday morning and found their bodies in their apartment in the San Fernando Valley neighborhood of Reseda.

Photos of three children are placed at a memorial with candles, flowers and balloons at the scene of a crime at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos of three children are placed at a memorial with candles, flowers and balloons at the scene of a crime at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

A GoFundMe fundraiser for the father had garnered more than $30,000 in donations by Monday afternoon.

Police have not disclosed a motive or how the children were killed. The Los Angeles Times reported that the children’s father, Erik Denton, said he’d been in a custody battle with Carrillo after she began acting mentally unstable. He had sought custody on March 1 and petitioned the court for a mental health evaluation of Carrillo. Another hearing in the case was scheduled for Wednesday.

Denton said he tried to get local authorities to intervene, but “in L.A. they wouldn’t help. The LAPD would not get involved,” he told the newspaper.

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

He said Carrillo was supposed to turn over the kids to him on Sunday.

Attorneys who represent Denton and Carrillo in the family court case did not immediately respond to requests for comment Monday.

Carrillo was arrested Saturday in the Ponderosa area of Tulare County, about 200 miles (320 kilometers) north of Los Angeles, according to the LAPD.

A woman leaves flowers at a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

A woman leaves flowers at a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Authorities said police initially received reports that Carrillo was driving her car and heading north on Interstate 5 when she got in an altercation in the Bakersfield area. She abandoned her car and carjacked another vehicle, police said.

The Los Angeles County District Attorney's Office did not immediately respond to a query about whether she would be extradited. The Los Angeles Police Department's Juvenile Division is handling the case and a police captain, Chris Waters, did not immediately return an emailed request for comment Monday morning.

This story has been updated to correct the spelling of the father's first name to Erik Denton, not Eric.

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

 Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Photos, candles, flowers and balloons are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

 Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)

Candles and crosses are placed as a memorial for three children who were killed at the Royal Villa apartments complex in the Reseda section of Los Angeles, on Monday, April 12, 2021. Authorities have identified 3-year-old Joanna Denton Carrillo, her 2-year-old brother, Terry, and 6-month-old sister, Sierra, as the three young children who were killed over the weekend. Their mother is the suspect in their deaths and was being held in a central California jail. (AP PhotoRichard Vogel)