British Prime Minister Boris Johnson is in intensive care as he battles the coronavirus.
Mr Johnson was moved to the ICU at St. Thomas’ Hospital in London “on the advice of his medical team” after being admitted to the facility the day prior.
A spokesperson for 10 Downing Street said the decision was made when Mr Johnson's condition worsened Monday afternoon, 11 days after he tested positive for the disease
"Over the course of this afternoon, the condition of the Prime Minister has worsened and, on the advice of his medical team, he has been moved to the Intensive Care Unit at the hospital," the statement read.
He is not yet on a ventilator and is still conscious, according to his spokesperson.
"The PM has asked Foreign Secretary Dominic Raab, who is the First Secretary of State, to deputise for him where necessary," the statement continued.
"The PM is receiving excellent care, and thanks all NHS staff for their hard work and dedication."
According to the statement, Mr Johnson was “in good spirits” and had a “comfortable night”.
The spokesperson would not comment on reports Mr Johnson was given oxygen, but officials are no longer describing his symptoms as mild. Earlier, the 10 Downing St spokesperson said in a statement that the leader had been admitted to hospital as a "precautionary step" because he had "persistent symptoms".
Communications secretary, Robert Jenrick told the BBC's Today program on Monday morning – before the prime minister was moved to ICU – that Mr Johnson was able to continue running the country despite being in hospital.
"I know for him personally it will be very frustrating that he's had to go to the hospital to have these tests, and he'll want to be back in Number 10 (Downing Street) leading from the front, which is his way," Mr Jenrick said.
"This wasn't an emergency admission, it was a planned admission, in order to have some routine tests.
"Those tests are underway and he'll stay in hospital as long as he needs to do that. But I've heard that he's doing well, and I very much look forward to him being back in Number 10 as soon as possible."
In a news conference Sunday night, US President Donald Trump said: "I want to express our nation's well wishes to Prime Minister Boris Johnson as he wages his own personal fight with the virus".
"All Americans are praying for him. He's a friend of mine, he's a great gentleman and a great leader," he said.