Munich  - John Demjanjuk, 89, is deemed physically and mentally able to stand trial for his alleged role in killing 29,000 Jews at a Nazi concentration camp in 1943, German prosecutors said Friday, quoting a medical report.

Ukrainian-born Demjanjuk, a US resident for five decades, was expelled to Germany this year to face accessory-to-murder charges.

Doctors have been closely examining him for weeks.

The medical report said he would not be able to more than two daily sessions of 90 minutes each before a trial court.

Prosecutors say they aim to indict Demjanjuk next month.

They say a Nazi personnel record shows that he worked as an auxiliary guard at Sobibor death camp at the time Jews were being taken there and killed in gas chambers. Sobibor is nowadays part of Poland.

Israel's supreme court found Demjanjuk not guilty in the 1990s on separate charges that he worked at another Nazi camp, Treblinka.(dpa)