VIENNA » An Austrian organization that tracks the fate of Nazi concentration camp inmates says the oldest known survivor of such a camp has died aged 107.

The Mauthausen Committee said today that Leopold Engleitner died April 21. After refusing to renounce his faith as a Jehova’s Witness, he survived three concentration camps and forced labor between 1939 and 1945.

He weighed just 60 pounds on release from the Ravensbrueck camp in 1943 after he agreed to work as farm slave laborer. Later ordered to report to Hitler’s army, Engleitner hid in the Tyrolean countryside until after the war ended.

Engleitner’s life was documented the book and film "Unbroken Will," by Austrian film-maker and author Bernhard Rammerstorfer, and he toured Europe and America to share his experiences.