"The Prime Minister is not on a ventilator, he has received oxygen support and of course one of the reasons for being in intensive care is to make sure that whatever support the medical team consider to be appropriate can be provided," the Metro newspaper quoted Gove as saying to the BBC Radio 4, adding that if Johnson's condition changes the government will make an official statement.

 

Gove's remark comes after the 55-year-old Prime Minister was moved to the ICU at the St Thomas' Hospital in London on Monday evening after his condition worsened, 11 days after he tested positive.

 

The Cabinet Minister further said: "The doctors, the nurses and the other staff there will be making appropriate medical decisions and they have our full support in the amazingly important work that they do."

 

When asked whether he knew if Johnson had been diagnosed with pneumonia, Gove told the BBC 4 Radio: "I'm not aware of that but I think it's also important to recognise that all of us are thinking about the Prime Minister's condition.

 

"If there are any changes in his condition – will ensure that the country is updated."

 

Announcing the news of Johnson's hospitalization on Monday night, a Downing Street spokesman said: "Since Sunday evening, the Prime Minister has been under the care of doctors at St Thomas' Hospital, in London, after being admitted with persistent symptoms of coronavirus.

 

"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 Prime Minister has asked Foreign Secretary Dominic Raab, who is the First Secretary of State, to deputise for him where necessary."

 

Johnson first announced that he had tested positive for COVID-19 on March 27, stating that he had "mild symptoms" of the virus.

 

His fiancee, Carrie Symonds, who is pregnant with the couple's first child, said two days earlier that she was "on the mend" after spending the "past week in bed with the main symptoms of coronavirus".

 

World leaders - including US President Donald Trump and French President Emmanuel Macron - have expressed their support for Johnson.

 

While Trump has offered help to treat the Prime Minister, Macron said said he sent "all my support to Boris Johnson, to his family and to the British people at this difficult moment".

 

Chancellor Rishi Sunak said his thoughts were with Johnson and Symonds, while Scotland's First Minister Nicola Sturgeon said she was "sending every good wish", the BBC reported.

 

Johnson's predecessor, Theresa May, and former Labour leader Jeremy Corbyn both said their thoughts were with him.

 

European Commission President Ursula von der Leyen also wished him a "speedy and full recovery", and nd Mayor of London Sadiq Khan tweeted that St Thomas' Hospital had "some of the finest medical staff in the world" and that the Prime Minister "couldn't be in safer hands".

 

The news about Johnson's health came as the number of coronavirus hospital deaths in the UK reached 5,373 - an increase of 439 in a day.

 

The Department of Health and Social Care said there were now 51,608 confirmed coronavirus cases.