Detectives are appealing for information following a report of a serious sexual assault in the Templegrove area of Derry in the early hours of Saturday 19 November.
It is believed that at approximately 3.15am, a young woman was assaulted by an unknown male, described as being of medium build, approximately 6'0" tall, with long hair down to his chin and stubble. He had a local accent and was wearing a dark trench coat and lace up boots.
Anyone with information about this incident is asked to contact Detectives in the PSNI's Rape Crime Unit (from the north) on 0845 600 8000. 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.