The PSNI are investigating after the body of 30-year-old Caoimhe Morgan was found in Belfast.
"The body of a ... woman was discovered in a property in Harcourt Drive this morning," said Detective Chief Inspector Darren McCartney.
"A post-mortem examination will take place in due course but I am treating her death as murder at this time," he said.
A 30-year-old man has been arrested on suspicion of murder and remains in custody.
"I am appealing for anyone who was in the area of Harcourt Drive and who witnessed anything or anyone with any information that can assist my investigation contact detectives on 101 quoting reference 790 18/12/21.
"Alternatively information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime," said Det Chief Insp McCartney.