Motorists warned over icy roads in Northern Ireland
Police have warned drivers of treacherous driving conditions and patches of black ice across Northern Ireland.
The 212 Ulsterbus service between Belfast and Derry has been withdrawn for the rest of the night due to the icy conditions on the Glenshane pass.
A train service between the two cities is running, but is also facing delays.
The main road between Coleraine and Limavady was blocked by snow on Saturday afternoon.
There are some reports that the road being used as an alternative route is now impassable because of falling snow.
Motorists are advised to allow plenty of time for travel.