Two Indiana children who were the subjects of an Amber Alert were found dead Monday night in the back seat of a car about 70 miles from where they were abducted.

The children's mother, 29-year-old Amber Susan Pasztor, is charged with murder, according to WSBT in South Bend, Indiana. She is being held without bond in the Elkhart County Correctional Center.

The body of a man believed to be 66-year-old Frank Macomber, a neighbor traveling with Pasztor, was also found about a half-mile from where the children were abducted. No additional details about his death have been released.

Autopsies scheduled for Tuesday are expected to confirm the identities of Liliana Hernandez, 7, and her 6-year-old brother, Rene Pasztor. The children’s bodies were found in a car parked near the Elkhart, Indiana, police station.

WSBT reported that a police officer leaving the station Monday night was approached by Amber Pasztor, who pointed him in the direction of a tan Mercury Mystique with her dead children inside. The car was also being sought in connection with the Amber Alert.

The Amber Alert was issued early Monday morning in the Fort Wayne area, where the children were living with their maternal grandfather, the news station reported. Pasztor’s father told police that his daughter was a drug addict and that he had been granted custody of the children more than a year before the abduction.

Pasztor also has a 3-year-old daughter whom she left behind when she took the older children, the news station reported.

She was due in court Monday morning for a hearing on criminal trespassing and invasion of privacy charges. An order for her arrest was issued when she didn’t show up.