Bahrain will suspend dine-in services at restaurants and cafes and move public and private schools to remote learning for three weeks to contain the spread of the coronavirus, the health ministry said.
It said it had detected a new variant of coronavirus in a number of cases, without specifying which kind.
The new lockdown measures will come into effect on Sunday.
There has been an uptick in coronavirus cases in the Gulf kingdom since December. The country registered 459 new cases on Wednesday, adding to a total of nearly 100,000 since the start of the pandemic, with 370 deaths.
The small island state has the third highest rate of vaccinations per capita in the world so far, according to the Our World in Data website, which is run by an Oxford University research programme.
Bahrain offers its citizens either the Pfizer/BioNTech vaccine or one manufactured by Chinese state-backed pharmaceutical giant Sinopharm free of charge.
The kingdom also approved the AstraZeneca COVID-19 vaccine on Monday for emergency use.
US President Donald Trump demanded Iran's 'unconditional surrender' on Friday, a dramatic escalation of his demands a week into the war he launched alongside Israel, which could make it more difficult to negotiate a swift end to it.
A three-year-old party led by rapper-turned-politician Balendra Shah looked set to sweep Nepal's general election on Friday, trouncing established rivals in a result analysts likened to a "tsunami".
Israel pounded Beirut's southern suburbs with airstrikes on Friday, stepping up a war with Hezbollah that has forced hundreds of thousands of Lebanese from their homes and killed more than 200, according to a health ministry toll.
The US Justice Department released FBI records on Thursday that summarise interviews of an unidentified woman who made accusations against President Donald Trump.
Lebanon's Hezbollah warned Israeli residents to evacuate towns within 5 km of the border between the countries in a message posted on its Telegram channel in Hebrew early on Friday.
The US House of Representatives rejected an effort on Thursday to stop President Donald Trump's air war on Iran and require that any hostilities against Iran be authorized by Congress, backing the Republican president's military campaign.
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