John Demjanjuk, 89, who is accused of being a guard at a Nazi death camp and was extradited to Germany from the United States in May, was charged Monday with 27,900 counts of accessory to murder, Munich prosecutors said in a statement. The accused, who denies any role in the Holocaust, was deemed fit to stand trial by German doctors, on the condition that the questioning be no longer than two sessions, each of 90 minutes, per day. Mr. Demjanjuk's family says that he is suffering from an incurable bone disease and has only about 15 months to live. The court did not say when the trial would begin.