A 27-year-old man was punched in the face and robbed of his phone as he walked along a city bridge.
Two men demanded the victim hand over his green Nokia 630 with headphones at about 1pm on Sunday between Loughton Park and Milton Keynes Railway Station.
They then left on foot towards Pitcher Lane. Police believe that an elderly woman who walked passed the victim may have witnessed the incident.
The first offender is white, medium build, in his twenties or thirties, and about 5ft 10in.
He was wearing a white T-shirt, black jeans and was carrying a record bag with a Union Jack on it.
The second man is black, of medium build and in his twenties or thirties. He was wearing a black top, black trousers, black beanie hat and was carrying a small black bag.
If you have any information, contact Det Con Kathryn Combstock on 101.
If you don’t want to speak directly to the police contact Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.
No personal details are taken, information is not traced or recorded and you will not go to court.