A 19-year-old man was robbed of his iPhone and wallet after falling over in a city underpass in the early hours of Sunday morning.
At 2.30am, the victim walked past three men in the underpass at Saxon Gate, close to Avebury Boulevard.
As he came out the other side he decided to run as he heard the offenders whispering to each other.
Unfortunately the victim fell to the ground and was then approached by the three men who stole his iPhone 4S and a black Next wallet.
The victim grazed his knees, but did not require hospital treatment.
The first offender is black, about 5ft 10ins tall, of average build with short black shaven hair. He was wearing a white long sleeved shirt and black jeans.
The second man is black, tall and of a stocky build. He was wearing a black puffed jacket with the hood up and grey tracksuit bottoms.
The third man was wearing a green hooded coat.
Anyone with information should contact detective constable Chris Oakman from Milton Keynes police station on 101.