Seven men were arrested after a report of the rape of a female during the early hours of Sunday morning.
Police said that the men, aged between 18 and 20, were arrested following a report of an incident at a property in Derry's city centre on February 23.
All seven men have since been released on bail pending further inquires.
A PSNI spokesperson said: "Detectives from PSNI Public Protection Branch are investigating a report of the rape of a female at a property in the city centre of Derry/Londonderry during the early hours of Sunday 23rd February.
"Seven males aged between 18 and 20 were arrested and later released on bail pending further inquiries.
"There are no further details at this time."
