Police in America are hunting for a driver who reversed into a mother pushing her child in a pushchair and dragged it across a car park before speeding off.

Police in Muskegon, Michigan, have released the video and images of the driver in a shop before the incident in an attempt to identify him.

The video shows the car backing into the woman and knocking her over before driving off with the pushchair containing the child apparently hooked on to the back.

The 18-year-old woman chases after the car which stops long enough for her to unbuckle her son and then drives off - taking the buggy with him.

The mother had a scraped knee but the 1-year-old was not injured.