Snow causes closures of more than 100 schools in Northern Ireland
Severe weather and heavy snow in some areas have resulted in more than 100 school closures in Northern Ireland and a second day of travel disruption.
Counties Londonderry, Tyrone and Fermanagh have been worst affected.
Translink bus services in and out of Derry and Limavady were suspended until 10:00 GMT. A limited service is now operating to and from the city and in the surrounding areas.
There is some disruption to buses in County Antrim and the Derry rail line.
A small number of staff at Derry's Altnagelvin hospital also had to stay overnight due to the bad weather.
Ferries between Rathlin and Ballycastle in County Antrim have been affected, with all sailings that were due to depart after 09:30 GMT on Wednesday cancelled
Police have advised motorists to take care when travelling, particularly when driving on untreated roads.
Harold Henry from Transport NI told BBC Radio Foyle that snow ploughs and gritters have been out overnight.
"It's been a very difficult time for our drivers, they have been out most of yesterday and last night.
"All roads are considered passable but with care."
The heavy snowfall in counties Derry and Tyrone has meant an unexpected day off for thousands of schoolchildren, but it also meant an unexpected night at work for some staff at Altnagelvin hospital.
A spokesperson for the hospital said: "A small number of staff had to stay in, we have planned arrangements in place for such eventualities.
"Public access to the hospital at this stage is like everywhere else in Derry difficult but accessible."
Many taxi companies in Derry have also suspended services.
In a statement, a Translink spokesperson said: "Due to adverse weather conditions, there is service disruption to Ulsterbus and Goldline services in the following areas: Ballycastle, Ballymena, Coleraine, Omagh, Cookstown and Dungannon.
"From 10:00 GMT onwards, Translink will be operate a limited service to and from Derry/Londonderry and surrounding areas. Services will be subject to delays and operate along main roads only. This will include service 212 and Foyle services.
"There is some disruption to rail services on the Londonderry Railway Line. Metro services are currently operating as normal."
Translink advised passengers to check its website and Twitter account for the latest travel updates.
A full list of school closures has been published on the BBC NI website.