British Prime Minister Boris Johnson’s condition has worsened since being hospitalised with persistent COVID-19 symptoms and he has been moved into intensive care, his Downing Street office said.
A spokesman said he was moved on the advice of his medical team and was receiving “excellent care”.
Mr Johnson has asked Foreign Secretary Dominic Raab to deputise “where necessary”, the spokesman added.
The prime minister, 55, was admitted to hospital in London with “persistent symptoms” on Sunday evening.
BBC political correspondent Chris Mason said the prime minister was given oxygen late on Monday afternoon, before being taken to intensive care. However, he has not been put on a ventilator.
Meanwhile, the COVID-19 death toll in the US has surpassed 10,000 from almost 350,000 coronavirus cases, according to the Johns Hopkins University tally.
Spain has reported more than 4,000 new cases of the coronavirus with over 600 new deaths on the fourth day the daily totals have declined.
The total number of deaths in Spain from COVID-19 on Monday passed 13,000 among more than 135,000 cases