White House officials have been ordered to wear face masks after two aides tested positive for the coronavirus.
The directive says all those entering the West Wing must wear masks, and discouraged unnecessary visits from other parts of the White House complex to the area.
Officials who work closely with President Donald Trump have been getting tested after his military valet and Vice-President Mike Pence's press secretary both tested positive last week.
Trump, who appeared for the daily media briefing without wearing a mask, said he kept "far away from everyone".
He, however, said he would maintain social distance from Pence, with communications restricted to phone calls for a period of time.
Both Trump and Pence, who have resumed travel outside of Washington, will be tested for the virus daily.
Russia has opened a criminal case against Ukrainian President Volodymyr Zelenskiy and put him on a wanted list, the state news agency TASS reported on Saturday, citing the Interior Ministry's database.
The death toll from rains in Brazil's southernmost state of Rio Grande do Sul rose to 56, local authorities said on Saturday morning, while dozens still have not been accounted for.
Hamas has said it is sending a delegation to Cairo on Saturday to discuss a deal for a truce and the release of hostages in Gaza, hours after US CIA Director William Burns arrived in the Egyptian capital, according to Egyptian sources.
NATO's four-month long military exercises near Russia's borders, known as Steadfast Defender, are proof the alliance is preparing for a potential conflict with Russia, a spokeswoman for Russia's Foreign Ministry said on Saturday.