The two children at the center of an Amber Alert issued Monday have been found dead. Liliana Hernandez, 7, and Rene Pasztor, 6, were last seen at 6:21 a.m. in Fort Wayne, according to a news release. Police believed the children were likely abducted by their non-custodial mother, 29-year-old Amber Pasztor.

At 5:25 p.m., an officer who was leaving the Elkhart Police Department was stopped by a female driver, later identified as Pasztor, who told him there were two dead in the car she was driving, according to Chris Snyder, a spokesperson for the Elkhart Police Department.

Officers searched the vehicle and found the two deceased juveniles in the back seat. Police believe the children are Hernandez and Rene Pasztor, however a formal identification will be released by the coroner’s office.

Investigators are still working to find more about the circumstances surrounding their deaths.

Pasztor was arrested Monday night on preliminary charges of murder. She is currently being held at the Elkhart Correctional Facility.

Police are still searching for Frank Macomber, who they believe will have more information about the incident. Police declined to say who the children were living with when they were abducted or why she may have taken them, Associated Press reported.

Indiana State Police issued the Amber Alert around 12:30 p.m. and canceled it as of 6:15 p.m., saying the children had been located.An autopsy has been scheduled for 11 a.m. Tuesday in Kalamazoo, Michigan.