A man has been taken to hospital after he suffered injuries following an assault during the early hours of Monday in Derry.
Police are asking the public to come forward if they have information about the assault that occurred around 1am in the Waterloo area of the city on April 25.
A spokesperson for the PSNI said: "Police are appealing for information following a serious assault in Derry/Londonderry in the early hours of this morning (Monday 2nd May).
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"At approximately 1am, a man, aged in his 20s was outside a bar in the Waterloo Street area of the city when he was struck by another man causing him to fall to the ground and hit his head.
"The victim was taken to hospital a short time later, where he is currently receiving treatment for his injuries.
"Anyone who may have witnessed the incident, have mobile phone footage or who may have any information that could assist with enquiries, is asked to contact police on 101 quoting reference 256 of 02/05/22.
"Alternatively, information can be provided to Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org."
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