Police are appealing for witnesses following a robbery in King Street, Kettering, on a busy Saturday lunchtime.
The incident happened between 12.30pm and 1pm on Saturday, October 31.
The victim, a man in his 20s, was approached by a man who threatened him with a pair of scissors.
He then forced the victim into an alleyway and stole cash and a mobile phone.
Witnesses, or anyone with information, are asked to call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.