Pope Francis suffers 2 episodes of respiratory failure, Vatican says

ROME -- Pope Francis suffered two episodes of "acute respiratory failure" on Monday, the Vatican said.

The episodes were caused by a "significant accumulation of endobronchial mucus and consequent bronchospasm," the Vatican's press office said in a brief statement.

Two bronchoscopies were performed on the pontiff, with "the need to aspirate abundant secretions." Non-invasive mechanical ventilation was resumed on Francis and he continues to be "alert, oriented and cooperative," the Vatican said.

His prognosis remains reserved, the Vatican said.

Earlier Monday, the Vatican said the pope "rested well" overnight, his 17th night in Rome's Gemelli Hospital.

"The pope rested well all night," the Holy See, the Vatican's press office, said in a brief statement.

The pope's clinical condition had on Sunday remained "stable," the church said. Vatican sources told ABC News on Sunday that the pope had eaten breakfast with coffee and continued his treatment. He read the daily newspapers, as usual, the sources said.

Francis, who has led the Catholic Church since 2013, was admitted to Gemelli on Feb. 14 and was diagnosed with bilateral pneumonia.

The 88-year-old pontiff had been in stable condition on Saturday, church officials said, following a bronchospasm attack on Friday.

This is a developing story. Please check back for updates.