A fallen tree is causing tailbacks on the Warrenpoint Road.
It's closed in both directions between Drumsesk Road and the Shore Road.
Police say diversions are in place.
Warrenpoint taxi driver Joe Kelly told Q Radio it took him an hour and twenty minutes to make a two-mile trip:
Police investigating Arson Attack in North Belfast
McIlroy honours omission came despite Stormont nomination
Police seize ‘significant quantity’ of drugs following chase
Woman dies in hospital after road crash in Co Fermanagh