GARDAI last night launched a murder inquiry after a woman was found stabbed to death in a house.
The victim, a Brazilian woman in her 20s, suffered a number of stab injuries.
She was found dead in the house on Lanesboro Street in Roscommon town at about 6pm.
It is understood that a Brazilian man in his 30s, who was in the house earlier, was arrested by gardai a short time later.
He is being held in Roscommon garda station under Section 4 of the Criminal Justice Act and can be held for up to 24 hours. Gardai are still trying to establish the circumstances leading up to the killing.