Thames Valley Police is appealing for information after a man was robbed of his mobile phone.
The victim, a 20-year-old man, was approached by another man in Fletchers Mews, Neath Hill, at about 11.45am on Tuesday.
The man first asked for the time before demanding the victim hand over his mobile phone. He then punched and headbutted the victim before taking the phone, which was an iPhone 3G. The victim suffered swelling above his eye but did not need hospital treatment.
The offender is white, aged between 19 and 21 years old, 5ft 9ins, of a skinny build with a small amount of facial stubble and slightly yellow teeth. He was wearing a grey hooded top with the hood up, black tracksuit bottoms and a ring on his left hand.
Detective Constable Sam Reynolds, based at Milton Keynes CID, said: “The offender was in a group of five or six people before he carried out the robbery.
“I want to speak to the other members of the group, or anyone who witnessed the robbery or who knows the identity of the offender.”
If you can help, please call Det Con Sam Reynolds via the 24-hour Police Enquiry Centre on 101. If you don’t want to speak to police or leave your name, call the charity Crimestoppers on 0800 555 111.