POLICE are investigating a report of a rapet in the Bogside area of Derry.
A woman has told police the serious sexual assault happened in the early hours of yesterday morning.
Three men were arrested following the alleged incident which occurred in the Tyrconnell Street area.
They were taken to the PACE custody suite at Strand Road police station for questioning.
A police spokesperson said two have been released unconditionally.
A third man has been released on police bail pending further enquiries.