Doctors have been put on standby at the Ulster, Mater and Royal hospitals, in Belfast and total of 15 people have been admitted to hospital. The are 11 people at the Royal and four at the Mater, said to be in a in a stable condition and are being kept overnight, according to UTV.
A Northern Island Ambulance Services spokesman said they dealt with casualties "at varying levels of consciousness".
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Remaining cold for most this weekend with the risk of ice overnight