Pope Francis has had blood transfusions as he continues to be treated for respiratory problems.

Vatican officials say the 88-year-old's condition is now critical, and he had to have help breathing yesterday.

Texas deacon Jesus Cardenas has said everyone is praying for a swift improvement.

"Hope is always there," he said.

"We are praying for him and the hope of a better world and we know and we have the hope things are going to get better."

The Pontiff is missing Sunday Mass for the second weekend in a row, after being admitted to hospital nine days ago.

Main image: Pope Francis blesses crowds in The Vatican, 4-9-16. Image: Linda Schaefer / Alamy