Convicted Nazi guard John Demjanjuk, 91, may face another trial, according to a report published Saturday in the German Tagesspiegel newspaper.

Two plaintiffs have filed charges against Demjanjuk and another former camp guard. They are accused of participating in the murders of 4,974 inmates at the Flossenbuerg Nazi death camp between October 1943 and December 1944.

The Flossenbuerg camp and satellite camps, located near the Czech border, housed 100,000 people. Of those, 73,000 were murdered, according to official statistics.

Earlier this year Demjanjuk was convicted of participating in the murder of 27,900 Jews in the Sobibor death camp in German-occupied Poland during World War II.

He was sentenced in May by a Munich court to a five-year prison term, after being held in prison for 18 months prior – during the trial – and also during a previous trial in Israel. 

Demjanjuk was extradited to Germany from the United States after a years-long struggle to retain his U.S. citizenship, which was revoked for lying about his past. He now faces a new probe in connection with the deaths of an additional 5,000 people, although he has yet to be imprisoned on the current conviction.

Citing his age, a judge has allowed him to be placed in a retirement home until the conviction is official – a process that can take months in Germany. The prosecutors, who requested a six year prison term, have appealed the sentence handed down. Demjanjuk's attorneys have also appealed, hoping for a new trial altogether and possibly an acquittal.