Nazi-hunters say they have strong evidence that the most wanted member of Hitler’s regime – known as Dr Death – is hiding in southern Chile.

The Simon Wiesenthal Centre believes Aribert Heim is in Patagonia, where his daughter is known to live.

Heim is said to have documented the victims he tortured and killed at Mauthausen concentration camp in Austria during World War II.

He is accused of killing Jews using exceptionally cruel methods. According to Holocaust survivors, he performed operations and amputations without anaesthetic to see how much pain his victims could endure.

Injecting victims straight into the heart with petrol, water or poison were said to have been his favoured method at Mauthausen.

After the war, Heim was detained by US forces but was not charged.

He practised medicine in the German town of Baden-Baden until 1962, when he fled the country after being tipped off that the authorities were about to prosecute him.

If he is still alive, Heim will be 94 years old.