Gardai working with the Police Service of Northern Ireland have arrested two men over the murder of another man from Ukraine.

Dmytro Grytsunov, 29, suffered a fatal chest wound when shots were fired in the Rooney Park area of Kilkeel, Co Down, last Saturday night in what is believed to have been a row between two groups of foreign nationals.

A man in his 20s was detained by gardai on Wednesday when he made inquiries regarding a passport application at Pearse Street Garda Station in central Dublin.

In a follow-up operation, a second man, also in his 20s, was arrested last night in the north of the city.