'This little guy is a hero' - boy in US rescues sister from moving stolen car

A young boy in the US state of Ohio is being praised for his quick actions that saved him and his sister from a moving stolen car.

According to Nine News, eight-year-old Chance and his 10-year-old sister Skylar were in the backseat of their great-grandmother's car after she parked it outside the doctors in Middletown, Ohio on Friday.

Nita Coburn was taking the children's mother to an appointment at the Atrium Medical Centre, when the two woman left the car.

Police allege that only seconds later Dalvir Singh, 24, got into Ms Coburn's car and drove off with the children still in the back.

Initially Ms Coburn hadn't realised the two children had escaped and chased the car down, opened the driver's door and attempted to stop the thief.

It's alleged by police that Ms Coburn was dragged a short way as the driver took off.

The vehicle was stopped by police not long afterwards and the driver was taken into custody.

He was charged with kidnapping, assault and motor vehicle theft.

"This little guy is a hero, no question," Middletown police chief Rodney Muterspaw said

"He pulled his sister out of the car with no concern for his own safety."