All schools in Northern Ireland are to shut for two weeks after a surge in Covid-19 cases.
Restaurants will also be closed for a month as part of stringent new measures to tackle the virus.
However takeaways and deliveries will still be allowed to operate.
The region is to impose the strictest coronavirus restrictions seen in the United Kingdom since early summer, First Minister Arlene Foster told regional lawmakers on Wednesday.
Northern Ireland has become one of Europe's biggest Covid-19 hotspots in recent weeks. Its health minister described the situation last Friday as becoming more grave by the hour and said further constraints were likely.
"The numbers have continued to rise, the doubling rate is of grave concern, and hospitalisations are on the increase," Foster and Deputy First Minister Michelle O'Neill said in a joint letter to regional lawmakers detailing the new restrictions.
"This is deeply troubling and more steps are now urgently needed."
The closure will affect the entire hospitality sector, with the exception of takeaway and delivery services, and double the length of the annual October school break from one week to two.
Under the measures, retail will remain open, but "close contact services" will be closed. People will be advised to avoid all unnecessary travel and work from home, while universities will be asked to teach remotely to the maximum extent.
