Cash was stolen from a teenager as he rode his bike along a Kettering street.
Police are appealing for information about the street robbery in Thorngate Street, Kettering, which took place on Monday, November 26.
Between 5.30pm and 6pm, a 15-year-old boy was riding his mountain bike along Montagu Street into Thorngate Street.
He was with a friend who was walking alongside him and they made their way towards Mill Road.
A police spokesman said: “As they did so, they were approached by two males who intimidated them and one of them stole cash from the boy on the bike.”
The main offender was a white boy, aged 15 or 16 and about 5ft 9in.
He wore a black Nike hooded top and bottoms and a black Nike beanie hat.
The other offender was white, of a similar age and height and of medium build with a pale complexion.
He wore a hooded red cardigan which had large black buttons and jeans.
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.