VIENNA, Sept 20 - Simon Wiesenthal, who waged an untiring campaign to track down Nazi war criminals and keep alive the memory of six million Jews killed in the Holocaust, died on Tuesday at the age of 96.

Wiesenthal, a Jew and former concentration camp inmate, was born in 1908 in what is now Western Ukraine. He was best known for helping with the discovery in Argentina of Adolf Eichmann, the man Adolf Hitler entrusted with carrying out the Nazi genocide program against the Jews.