The Vatican on Tuesday called the health condition of Pope Francis "guarded" and "complex" as he remained in a stable condition with double pneumonia, according to officials.

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, batting double pneumonia in hospital, remained stable throughout the day on Tuesday and did not have any new respiratory crises, the Vatican said.Francis, 88, had suffered two episodes of what the Vatican described as "acute respiratory insufficiency" on Monday.