The Castleblayney to Dundalk road has reopened after a fatal crash yesterday.
A man in his 50s was killed in the collision which involved a lorry and two cars.
It happened at around 10.30am between the border and Hackballscross in Co Louth.
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The road reopened overnight.
Gardaí are appealing for anyone with information, or those with dashcam footage, to come forward.