German prosecutors say they have reopened hundreds of dormant investigations into the cases of former Nazi death camp workers.

That's after John Demjanjuk, 91, was convicted in May for 60 counts of murder for serving as a guard at the Sobibor extermination camp in Nazi-occupied Poland.

It was the first time prosecutors were able to convict someone in such a case without direct evidence.

Dr Efraim Zuroff is the Simon Wiesenthal Centre's top Nazi hunter and author of the book, Operation Last Chance: One Man's Quest to Bring Nazi Criminals to Justice. He spoke to Radio 5 live Breakfast about whether this would lead to further convictions.

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