India, April 11 -- Pope Francis, who is recovering from double pneumonia, was spotted in black pants instead of his usual traditional white papal attire at the St. Peter's Basilica in the Vatican on Thursday. Videos of the 88-year-old being wheelchaired in the church, wearing pants and a striped blanket around his chest surfaced on social media.

The Vatican chief could be also seen waving at visitors to the basilica. He had a small nasal hose to receive supplemental oxygen.

"We were visiting St. Peter's Basilica and saw some guards passing by and making way, so we went to see what it was, and it was the pope. Few people noticed, it was very quick, but he stopped to talk to a family with a baby," Luiz Gil, who took the video, said.

Whil...