Ireland's health service has temporarily shut down its IT system after what it described as a "significant ransomware attack", APA reports citing BBC.
The Health Service Executive (HSE) said it had taken the precaution of closing down its systems to further protect them and assess the situation.
Dublin's Rotunda Hospital has cancelled outpatients visits, due to a "critical emergency", unless women are 36 weeks pregnant or later.
All gynaecology clinics are cancelled.
The maternity hospital said those with any urgent concerns should attend.
The National Maternity Hospital at Holles Street in Dublin also said there would be "significant disruption" to its services on Friday "due to a major IT issue".
The HSE said that Covid-19 vaccinations would proceed as normal.
It has apologised to patients and the public and said it would give further information as it becomes available.