Pope Francis suffered two episodes of "acute respiratory insufficiency" on Monday as the 88-year-old pontiff continues to battle pneumonia, according to Vatican News, citing the Holy See Press Office.

Pope Francis, batting double pneumonia in hospital, remained stable throughout the day on Tuesday and did not have any new respiratory crises, the Vatican said. Francis, 88, had suffered two episodes of what the Vatican described as "acute respiratory insufficiency" on Monday.

Pope Francis suffered two episodes of acute respiratory failure Monday, the Vatican said, a fresh setback in the worst health crisis of his papacy.