Pope Francis is resting after he suffered further setbacks in his fight against pneumonia. In its early Tuesday update, the Vatican said: “The pope slept through the night, now rest continues.”

The Vatican said the breathing issue was caused by a “significant accumulation" of mucus in Pope Francis’ lungs and bronchial spasms.

Pope Francis experienced more respiratory problems and went on noninvasive ventilation on Monday, the Vatican said, as the head of the Roman Catholic Church battles double pneumonia in the hospital.