A 28-year-old man was the victim of an attempted robbery in Windmill Avenue, Kettering in the early hours of Monday (June 30).
The victim was walking along the road at about 1.50am when he was approached by a man who asked for his mobile phone before pushing him to the ground.
The victim called to his friend who was walking ahead of him at which point the offender ran off.
The offender was white, 5ft 6ins, with a shaved head and was wearing a black hooded top.
Police would like to speak to anyone who may have witnessed this incident or have any information regarding it.
Witnesses or anyone with information is asked to contact police on 101 or Crimestoppers anonymously on 0800 555111.