Police are appealing for information after two men were assaulted while walking through Londonderry on Sunday morning.
The two victims were walking through Magazine Street and Guildhall Square in the city, before they were attacked by another man at around 2am.
Police said one man sustained injuries to his knee and hand while the other victim suffered head and arm injuries.
Both men had to attend hospital for treatment.
Police have asked anyone who was in the area to contact them.
PSNI Inspector Vince Redmond said: "We are working to establish what happened and why, and we are keen to hear from anyone who was in the Magazine Street/Guildhall Square area at around 2am and witnessed what occurred.
“I am also appealing to anyone who has information about what happened to call us on 101, quoting reference number 313 04/07/21.
“A report can also be made using the online reporting form via www.psni.police.uk/makeareport Alternatively, information can be provided to Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.”