Pope Francis's condition continues to be "critical" after suffering a "prolonged asthma-like respiratory crisis" earlier on Saturday, the Vatican has said.
The pontiff is "more unwell than yesterday" and had received blood transfusions, the statement said.
The Vatican said the 88-year-old was alert and in his armchair, but required a "high flow" of oxygen and his prognosis "remains guarded".
The Pope is being treated for pneumonia in both lungs at the Gemelli Hospital in Rome.