A man was allegedly robbed on a night out between Alexandra Road and Ash Grove in Hull's Beverley Road.
It happened between 2am and 2.30am on Friday, August 30.
The man, 25, was walking down Beverley Road following a night at the Welly Club when he was approached by four unknown men.
They allegedly threatened him, before pushing him into a hedge.
The men then stole his blue Samsung Galaxy S3 mobile phone and brown leather wallet, before leaving the area.
The victim was not injured.
Officers are appealing for witnesses to the crime to call police on 101, quoting log 65 of August 30 or Crimestoppers anonymously on 0800 555111