Pope Francis' condition appeared to stabilize on Tuesday morning after medical intervention amid two episodes of "acute respiratory failure" on Monday, Vatican sources told ABC News. The pope, 88, was taken off noninvasive mechanical ventilation and resumed receiving supplemental oxygen through a nasal tube,

Pope Francis had recovered enough Tuesday from two acute respiratory crises to no longer require noninvasive mechanical ventilation, the Vatican said, and was receiving just high flows of supplemental oxygen.

Francis is being treated with supplemental oxygen to assist him with breathing, the Vatican said Tuesday, a day after he suffered two episodes of acute respiratory failure.