Gardaí in Dublin have begun a murder investigation following the death of a woman at a house in Clondalkin in the early hours of this morning.
The woman, a 41-year-old mother of three who lived at the house, is believed to have been stabbed to death.
She has been named locally this evening as Catherine Ward.
It is understood that gardaí were called to the house at Greenfort Drive at around 12.30am.
Ms Ward was found with serious injuries. A doctor was called and she was pronounced dead at the scene.
A 51-year-old man, who knew her, was arrested early today.
He was taken to Lucan Garda Station, where he can be questioned for up to 24 hours.
The State Pathologist Dr Michael Curtis carried out a preliminary examination at the scene before the woman's body was removed.
A post-mortem examination took place this afternoon.
Gardaí say they are following a definite line of inquiry and are not looking for anyone else at present.
They have also not issued an appeal for information.