A nine-year-old boy ended up in hospital after his 10-year-old brother apparently ran him over with a stolen car in Michigan in the US, authorities said.

Roscommon County sheriff's department responded early on Sunday after a woman called to report her sons had broken into a car dealership and driven cars in the parking lot, TV stations WWTV and WPBN reported.

The boys were turned over to their parents but deputies were called to the boys' home several hours later after the nine-year-old got pinned under a car.

Deputies said the boys returned to the Roscommon dealership, stole cars and drove around Roscommon.

One ended up in a snow bank and the other in the boys' garden, the department said. The boy was freed and airlifted to hospital.

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