The mayor of the US city of Phoenix has apologised after a video allegedly showing police threatening to shoot a black family went viral.

Officers were responding to an alleged shoplifting incident last month when the video was recorded.

Police officers can be seen shouting at the family to get out of their vehicle before threatening them.

The parents say they did not realise their four-year-old had taken a $1 (£0.79) Barbie doll from a store.

Mayor Kate Gallego said the officers’ actions were “completely inappropriate and clearly unprofessional”.