Pope Francis suffered a "prolonged" asthmatic respiratory crisis Saturday morning with doctors having to supply oxygen, the Vatican said.

The pope's condition remains critical, according to a statement.

"The Holy Father continues to be alert and spent the day in an armchair although in more pain than yesterday," the Vatican said. "At the moment&nbsp;the prognosis is reserved."

This is a developing story. Check back for updates.

The "prognosis is reserved," the Vatican said Saturday.{ai:summary}Pope Francis experienced a serious asthmatic respiratory crisis requiring oxygen support, with his condition remaining critical. The Vatican reported that he is alert but in more pain than the previous day, and the prognosis is uncertain. #health

Pope remains in critical condition, suffers 'prolonged' asthmatic respiratory crisis: Vatican

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