Vatican officials have said Pope Francis has developed pneumonia in both lungs, further complicating his recovery. The 88-year-old pontiff was hospitalized Friday after a weeklong bout of bronchitis worsened.

The Vatican said Pope Francis has the "onset of bilateral pneumonia," and that tests, a chest X-ray and the pope's clinical condition present a "complex picture."

The Vatican said Francis had slept well and eaten breakfast. A further medical update is expected later on Wednesday.