Pope Francis, hospitalised for two weeks with pneumonia in both lungs, spent a peaceful night after suffering a breathing crisis, the Vatican said Saturday. "The pope spent a peaceful night and is resting," it said in a statement.

The 88-year-old pontiff was put on a ventilator because of an "isolated" breathing crisis on Friday, the Vatican said.

His doctors said it would take the next 24 to 48 hours to see if this breathing trouble has worsened his condition or not, a Vatican source said.

The pontiff is "not out of danger" but was "in good spirits", the source added.