A woman who had been diagnosed with swine flu has died in hospital in Northern Ireland.
The woman, who has not been identified, died on Thursday night. It is understood she had an underlying health condition.
She is the first person diagnosed with swine flu to die in Northern Ireland.
Meanwhile, every school in Northern Ireland has been sent information on what to do in the event of a swine flu outbreak.
Health Minister Michael McGimpsey said the woman's family had asked for privacy at this "tragic and very sad time" and no further details would be released.
Lee Porter, a soldier from Coleraine, County Londonderry, died from swine flu at a hospital in Surrey on 31 July.
The Department of Education said on Friday it had compiled instructions for schools and advice for parents.
If a child shows symptoms, the department said, he or she should be taken from class and isolated from other children while waiting for someone to take them home.
"Because the flu is likely to spread through the community anyway, schools are advised not to close during an outbreak, apart from exceptional circumstances where they cater for children who are particularly vulnerable to infection or are very short of staff," the department said.
The circular to schools said pregnant teachers or those recovering from illness were regarded as an "at risk" group and are told to avoid close contact with swine flu sufferers.
However, the department said pregnant teachers were not at a higher risk in school than in their out-of-work life.