Police are investigating reports of a "serious sexual assault" at a Derry city centre bar last night.
The incident is alleged to have happened on licensed premises on Ferryquay Street between 10.30pm and midnight.
Officers are hoping to speak to anyone who witnessed or heard anything in or around the bar's toilets as they work to establish details.
A PSNI spokesperson said: "Detectives from the Public Protection Branch are appealing for witnesses following a serious sexual assault in Derry last night [Saturday, February 29].
"They are working to establish the circumstances of the incident and are appealing for anyone who has any information that can assist their investigation to contact 101 quoting reference 2001 29/02/20.
"Detectives are particularly keen to speak with anyone who was in licensed premises on Ferryquay Street between 10.30pm and midnight and who witnessed or heard anything in the area of the toilets."
Details can also be passed to Crimestoppers anonymously on 0800 555 111.
