Investigators say twin 3-year-olds died after being left inside a car in northeastern Kansas for more than two hours.

The Topeka Capital-Journal reports the twins were found in the car parked in their driveway two hours after being reported missing near Topeka.

A girl in the back seat of the unlocked car was pronounced dead at the scene. A boy in the front seat died at a hospital.

The temperature was about 75 degrees but authorities say it could have been 30 degrees hotter inside the car, with the windows rolled up.

Detectives have been questioning the mother.