Twin girls were found dead in a car in Hinesville, Georgia Sunday afternoon. Police have identified the victims as Raelynn and Payton Keyes, both three years old.

According to authorities, a caregiver had found the toddlers' bodies and called 911 around 1:42 p.m. Officers arrived at the scene to find both the victims unresponsive in the car, NBC affiliate WSAV reported.

Medics arrived at the scene and declared the girls dead. The cause of death is not clear, however, the temperature in Hinesville had reached 90 degrees on Sunday.

According to the authorities, the girls were in foster care and had been staying with two caregivers for almost a year and a half. The house where they were found was the place the twins visited frequently.

“This is actually not the home of the caregiver or the children, this is someplace they come from time to time and do stay for extended periods of time and they were here visiting when this unfortunate tragedy took place,” Capt. Tracey Howard with the Hinesville Police Department told WSAV.

Investigators were not sure how the girls had gotten into the car.

"A crime scene unit processed the scene with the assistance from GBI and the bodies of the children were removed from the scene and taken to the crime lab. Autopsies will be performed on Monday, September 30," a statement released by the City of Hinesville said.

If the cause of death is determined to be the heat, then Raelynn and Payton Keyes would be the 45th and 46th victims to die in hot cars this year in the U.S.

They would also be the second set of twins to die in similar condition this year after two infant twins had died because of being left in a car for over 8 hours by their father, Juan Rodriguez, who had gone to work for the day.

A New York Medical Examiner's car is parked outside the Metropolitan Correctional Center in New York, where well-connected accused sex trafficker Jeffrey Epstein was found dead while in detention
A New York Medical Examiner's car is parked outside the Metropolitan Correctional Center in New York, where well-connected accused sex trafficker Jeffrey Epstein was found dead while in detention AFP / Don Emmert