Russian Prime Minister Mikhail Mishustin has said he’s tested positive for coronavirus.

“It just became known that the coronavirus tests I took came back positive, so I must oblige by the self-isolation rules and it’s mandatory [that I do that] for the safety of my colleagues,” Mishustin said in a videoconference with President Vladimir Putin, a segment of which aired on state news channel Russia 24.

Mishustin proposed the candidacy of his deputy Andrey Belousov for the position of acting prime minister. Putin has signed a decree appointing Belousov.

So far this is the highest-profile case among politicians in Russia, which as of Thursday officially reported more than 100,000 coronavirus cases.