The press office for the Vatican said Sunday that Pope Francis was able to rest overnight as he slowly recovers from double pneumonia after initially being hospitalized for bronchitis.

Pope Francis, battling double pneumonia, remains in a critical condition and his prognosis is still guarded because of the "complexity" of his clinical condition, the Vatican said on Sunday.

Francis, 88, is in critical condition at a Rome hospital with a complex lung infection. The Vatican said he was "alert and spent the day in an armchair" on Saturday.