Scenes of Crime Officers have arrived at Dukes Bar on Spencer Road, in the Waterside.
They are examining the scene at the bar where a serious assault occurred at 9.30pm on Sunday night.
Earlier today police confirmed that they had arrested a 33-year-old man following what they called “a serious assault on a 31-year-old man” at licensed premises in Duke Street, at approximately 9.30pm on Sunday.
It is understood the 31-year-old man was taken to hospital for treatment to facial injuries and as of this afternoon, the 33-year-old remained in police custody. It is believed no weapons were used in the assault.
Police would ask anyone who may have witnessed this incident or who has any information to contact them at Strand Road on the non emergency number 101. Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.