Pope Francis slept comfortably without additional complications but remained in critical condition with kidney and respiratory issues, the Vatican said Monday morning.

Pope Francis was found to have pneumonia in both his lungs Tuesday and his condition remains "complex," the Vatican said in a health update on the 88-year-old pontiff who was hospitalized last week. The big picture: The pope was admitted to Rome's Agostino Gemelli Hospital on Friday with bronchitis symptoms and his treatment was changed after doctors found he had a polymicrobial infection of the respiratory tract.

ROME -- Pope Francis is "resting" on Monday morning after spending his 10th night in the hospital, the Vatican press office said. "The night passed well, the Pope slept and is resting," the office said in a short statement.