A six-year-old boy narrowly escaped being run over by a bus after he tripped over guardrails.

CCTV video filmed in southern China's Chongqing on April 25 shows a boy running along the street suddenly tripping over guard rails and somersaulting onto the road just as a bus is passing.

His mum climbs over the guardrails immediately and carries him back to the side of the road.

The boy suffered minor leg injuries.