Gardai say the examination of a flat in Raphoe, in which a woman in her 40s was last night found dead, will determine the course of the investigation.
The body of the 43 year-old woman was discovered in an apartment on William Street, Raphoe, Co. Donegal.
Gardaí were informed of the discovery on Thursday at approximately 8 p.m. by ambulance personnel.
The scene has been preserved and the body remains at scene and the state pathologist has been informed.
He will attend this afternoon and his findings will determine the course of the investigation.