A group of men carrying weapons threatened four teenagers in a theatre car park.
Police are appealing for information about the robbery which took place at about 7pm yesterday (Monday) in the rear car park of The Castle theatre in Wellingborough.
The victims – two 16-year-old boys and two 18-year-old men – were approached by three men carrying weapons.
A police spokesman said: “The men used threatening language towards the group before forcing them to hand over personal items such as mobile phones, cash and a tablet device.
“The offenders made off towards Castle Street and are believed to have entered a vehicle which drove off at speed.
“The vehicle is described as having a ‘loud’ exhaust.”
The first offender was a white man, in his early 20s, about 5ft 9in, of muscular build, with short dark shaved hair and wore a white vest top.
The second offender was a white man, in his late teens, about 5ft 9in and wore a red hooded top with the hood up.
The third offender was a white man, in his late teens, about 5ft 9in and wore a blue hooded top with the hood up.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.