A 12-year-old boy was threatened and robbed while he was walking through a park in Kettering.
The incident happened on Saturday, September 24, at about 4.15pm when the victim and his friend were approached by two teenage boys in Meadow Road, one of whom was riding a BMX bike.
The boy on the bike threatened to assault the victim unless he handed over his bag which, in fear of being hurt, he did.
The offenders searched through it and stole cash and an iPhone 5.
They made off towards Kettering town centre in the direction of McDonalds.
Both were white, about 14 years old, about 5ft 7in and slim.
The one on the bike wore a grey tracksuit and the other wore a red and black hooded top with black trousers.
Anyone with information should contact police on 101 or Crimestoppers anonymously on 0800 555111.