The Holy See has announced that blood tests showed early signs of kidney failure in Pope Francis, who has been in hospital battling a complex lung infection for over a week.

In a late update, the Vatican said Francis hadn’t had any more respiratory crises since Saturday night but was still receiving high flows of supplemental oxygen.

Pope Francis remains in "critical" condition after being hospitalized on Friday, February 14, for bronchitis. Although the Vatican insists that the pope remains alert and "well-oriented," blood tests have shown early kidney failure.