A section of the M1 motorway in the north has been closed in both directions following a serious collision.
The M1 joins the N1, which is the main route between Belfast and Dublin.
The M1 has been closed in both directions. City bound traffic is being diverted at junction 6 (Saintfield Road) and Lisburn bound traffic at junction 3 (Blacks Road) following a serious collision.
The crash happened shortly after 7am this morning and the PSNI says the road's likely to remain closed for some time.
It comes as motorists flock south for today's All Ireland GAA final between Armagh and Galway at Croke Park.