The United States will broaden its European coronavirus travel ban, adding the United Kingdom and Ireland to the list.
The ban will come into play midnight Monday, Vice-President Mike Pence announced.
"The president has made a decision to suspend all travel to the UK and Ireland," he said. "Americans in the UK and Ireland can come home. Legal residents can come home . . . they will be funnelled through specific airports and process."
Meanwhile, President Donald Trump, who has tested negative for COVID-19, hinted he was considering domestic travel restrictions "specifically from certain areas".
"If you don’t have to travel, I wouldn’t do it," he told reporters.
In the UK, the total number of deaths has touched 21, with 1,140 infections.
Syrian troops entered the predominantly Druze city of Sweida on Tuesday following two days of clashes, the first time government forces have deployed to the city since Ahmed al-Sharaa took over as President in December.
NASA retiree turned private astronaut Peggy Whitson splashed down safely in the Pacific early on Tuesday after her fifth trip to the International Space Station, joined by crewmates from India, Poland and Hungary returning from their countries' first ISS mission.
US President Donald Trump announced new weapons for Ukraine on Monday, and threatened sanctions on buyers of Russian exports unless Russia agrees a peace deal, a major policy shift brought on by frustration with Moscow's ongoing attacks on its neighbour.
India has ordered its airlines to examine fuel switches on several Boeing models, while South Korea said it would order a similar measure, as scrutiny intensified of fuel switch locks at the centre of an investigation into a deadly Air India crash.
US President Donald Trump said he will send Patriot air defence missiles to Ukraine, saying they are necessary to defend the country because Russian leader Vladimir Putin "talks nice but then he bombs everybody in the evening".