Police are appealing for witnesses or any drivers with dash cam footage as part of an investigation into three linked robberies on the same day in Wimbledon.
The first incident took place in Ridgway Place, near the junction with Ridgway, at 6.15pm on Sunday, September 1.
Three black men in a white Volkswagen Polo, registration LD19 CXK, pulled up to two 16-year-old boys and threatened them.
The men intimated they had knives and made the boys hand over items of their property.
The second incident took place on the same evening shortly after 6.30pm.
Two 17-year-old boys were walking along Grand Drive, when a white volkswagen Polo carrying three black men pulled up beside them.
The victims were approached and forced to hand over property, the offenders again intimating they had knives.
And at 6.45pm three black men robbed a 19-year-old man after they pulled up in a white Polo in Linkway. The victim was threatened with a knife and forced to hand over his property.
The car was later found and items from the robberies were recovered.
A 19-year-old man was arrested and charged with five counts of robbery and one count of possessing a knife in a public place.
Call Crimestoppers on 0800 555 111 with information.