A 57-year-old man has been arrested on suspicion of attempted murder.
He was arrested by detectives following an assault in Newry, Co Down in the early hours of this morning.
A 27-year-old man was found with stab injuries to his chest shortly before 3 am.
Police say the incident happened at a house in Carnagh Park in the city.
The injured man is believed to be in a serious but stable condition in hospital.
The arrested man was also treated for stab injuries to his leg which are not believed to be life-threatening.
He is currently being held at Newry’s Ardmore police station for questioning.