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.
The United States on Friday attacked military targets on Iran's main oil hub of Kharg Island, President Donald Trump said, threatening to strike oil infrastructure on the island if Iran continues to block shipping through the Strait of Hormuz.
The United States is offering a reward of up to $10 million for information about senior Iranian military and intelligence officials, including its new Supreme Leader, Ayatollah Mojtaba Khamenei.
Iran's new Supreme Leader Mojtaba Khamenei is wounded and likely disfigured, US Defence Secretary Pete Hegseth said on Friday, questioning Khamenei's ability to govern after nearly two weeks of US and Israeli attacks.
All six crew members aboard a US military refueling aircraft that crashed in western Iraq are confirmed to have been killed, the US military said on Friday.