A 14-year-old girl had her mobile phone stolen in a robbery in Bletchley on Monday.
At about 7.30pm, the victim was walking with a friend along Sherwood Drive Redway opposite the train station in Bletchley, when two men approached her.
One of the men pulled a balaclava down over his face while the other man demanded her mobile phone, threatening to stab the victim if she refused.
The victim saw a handle of a knife sticking out of the waistband of his trousers and let go of her white Pearl 8520 BlackBerry phone.
The offenders walked off towards the Blue Lagoon nature reserve.
The first offender is white, about 5ft 8ins, of medium build, with a pale face and small nose. He was wearing a bright blue flat cap, a Nike grey top with a hood and blue Nike tracksuit bottoms.
The second offender is white, about 6ft, of slim build and he was wearing a black balaclava rolled up on his head, a black Adidas hooded top and black jogging bottoms.
Detective Constable Sam Reynolds, of the Priority Crime Team based in Milton Keynes, said: “I would like to hear from anyone who was in the area at the moment, or if they saw two men fitting the above description.
“Anyone who has been offered a white Pearl BlackBerry phone IMEI number 351505051452236 should contact police.”
If you can help please call the Thames Valley Police 24-hour non-emergency number 101 and ask to speak to Det Con Reynolds.
If you don’t want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org.