Dr. Aribert Heim reportedly was living under an assumed name, Tarek Hussein Farid, and had converted to Islam by the time of his death of intestinal cancer.
Known as "Doctor Death," Heim was wanted for killing hundreds of prisoners at Buchenwald, Sachsenhausen and Mauthausen concentration camps by performing gruesome medical experiments, including removing organs from victims without anesthetic and injecting poisonous liquids such as gasoline into their hearts.
After the war, Heim lived in Baden-Baden, Germany, where he had a wife and two sons, the Times said. He fled in 1962 to avoid capture by Nazi hunters.
The Times and the German television station ZDF confirmed Heim's death with the help of documents provided by members of the Doma family, proprietors of the hotel here where he resided in Egypt.
However, where he was buried remains a mystery, the Times said.
Heim was born June 28, 1914, in Radhersburg, Austria, and joined the Nazi party before Germany annexed Austria.