BERLIN (AP) — A former Auschwitz death camp guard has launched a bid for clemency in a final bid to avoid serving his sentence as an accessory to murder.

The dpa news agency reported Monday that attorneys for Oskar Groening have filed the appeal with authorities in Lueneburg, where he was convicted in 2015 as an accessory to the murder of 300,000 Jews. He was sentenced to four years in prison.

It wasn't immediately clear what argument the 96-year-old made for clemency, but a doctor has determined Groening is fit to go to prison if there's appropriate medical care.

Hannover prosecutors, who have been handling Groening's case, told The Associated Press that Groening hasn't yet been summoned to report to prison, but that hearing of the clemency appeal shouldn't delay that process.