Former pope Benedict, 95, who in 2013 became the first pontiff in 600 years to step down, is "very sick," his successor Pope Francis said on Wednesday. He has asked the church to pray for him. In a statement, the Vatican later said Benedict had suffered a sudden "worsening" of his health in the previous hours. It also said the former Pontiff's condition was "under control" and that he was receiving constant medical attention. Edward Baran reports.