Ireland's health service has temporarily shut down its IT system after what it described as a "significant ransomware attack".
The Health Service Executive (HSE) said it had taken the precaution of closing down its systems to further protect them and assess the situation.
Ireland's health minister, Stephen Donnelly, said the incident was having "a severe impact on [the] health and social care services".
Emergency services continued, he said.
A number of hospitals in the Republic of Ireland are reporting disruption to services.