A teenager is wanted by police after a knifepoint robbery on a motorised bike.

Three people were approached by a boy who threatened them with a knife in Crawley before stealing a bag from them.

The teenager, who was described as being between 15 and 17 years old, then left on a motorised bike.

Officers are appealing for witnesses and have released a picture of someone they wish to speak to in connection with the incident.

A spokesman for the force said: "The man has been described as 15-17 years old, 5’5”, wearing a black balaclava, a black Canada Goose coat with a fur hood, a black tracksuit and a black rucksack."

Anyone with information should contact the police online or call 101 quoting serial 617 of 18.05.