The M1 Dublin/Belfast Rd northbound is closed from Junction 14 Ardee due to what is being described as an 'incident' this evening.
Motorists are being advised to follow diversions that are in place. Traffic is reported to be backed up to the Applegreen service station at Castlebelligham.
There were earlier reports on AA roadwatch of a pedestrian on the motorway between the exit for Castlebellingham and Dundalk south.
There are reports that a woman in her 60s was taken to hospital in a serious condition.
UPDATE AT 9.30pm: The M1 northbound is now reopened.
More as we get it.