AN overnight frost has left roads across Northern Ireland icy after temparatures plummeted.
The PSNI are advising motorists to exercise caution on the roads this morning due to a blanket of frost.
The warning was sounded after a school bus carrying 28 children left the road in icy conditions in Co Derry/Londonderry.
There are no reports of any injuries in the accident which happened on the Knockadoo Road near Moneymore on Wednesday morning.
It is understood the children were from Lissan and Churchtown primary schools and Cookstown High School.
The police are asking parents not to go to the scene due to the treacherous road conditions.
A Traffic Branch spokesman said: “It’s a cold December morning so take care.”