A man was treated for cuts to his head following a reported assault in the Crawford Square area of the city last week.
Police in Derry have now launched an investigation following the alleged attack in the early hours of Wednesday, June 15.
A PSNI spokeswoman said: “The man reported being punched and kicked by a male sometime between 1am and 1.30am in the area of Crawford Square. He was later taken to hospital and treated for cuts to his head.”
Constable Monica McColgan has appealed to anyone who may have seen a male, described as being of medium build and wearing a black jumper, jeans and brown boots in the vicinity of North Edward Street, Clarendon Street, Northland Road or Crawford Square at the time of the assault to contact officers at Strand Road on 101 quoting reference 84 15/06/16.
Information can also be given anonymously through the independent charity Crimestoppers on 0800 555 111.