Vatican City, March 4 -- 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.

In a statement on Monday, the Holy See Press Office said, "Today, the Holy Father suffered two episodes of acute respiratory insufficiency, caused by a significant accumulation of endobronchial mucus and consequent bronchospasm."

"Two bronchoscopies were therefore performed, with the need to remove large secretions," it added.

It further said that non-invasive mechanical ventilation was resumed in the afternoon. According to the statement, Pope Francis remained alert, oriented and cooperative at all times.

In a s...