Gardai have sealed off a house on the outskirts of the village of Doochary in West Donegal.
Locals reports say that a fire was started at the house and that a woman was fatally injured.
There are also reports that a man has been arrested but this has not yet been verified.
No other details are available at this time.
Donegal Daily has contacted the Garda Press Office for details and are awaiting a response.
We will bring you more on this breaking story as we get it.