ROME (AP) — Pope Francis remained in critical condition Monday but showed slight improvement in laboratory tests and resumed some work, the Vatican said, including calling a parish in Gaza City that he has kept in touch with since the war there began.

Pope Francis was in critical condition Saturday after he suffered a long asthmatic respiratory crisis that required high flows of oxygen, the Vatican said.

Pope Francis has shown “a slight improvement” in his health while being hospitalized for double pneumonia, but he is still considered to be in critical condition. The 88-year-old has spent the last 10 days in a Rome hospital.