A man was walking along the Boulevard around 7.45pm on 11 September 2017 when he was approached by a man.
The man produced a knife and demanded the victim’s phone and money. The victim refused and was assaulted by the man.
The victim was left with minor bruises and grazes. Nothing was taken from him.
The suspect has been described as white, tall with a tattoo on his neck. He was wearing dirty, pyjama-like clothing.
Humberside Police believe that a number of people were in the area at the time and may have seen what happened.
If anyone has any information then please call 101 quoting log number 490 of 11/09/2017 or Crimestoppers anonymously on 0800 555 111.