The Nazi-hunting Simon Wiesenthal Center said Monday that fugitive Dutch war criminal Klaus Carel Faber has died at age 90.

The center said Faber died last week in a hospital the southern German city of Ingolstadt.

Faber, a member of the Nazi SS, was sentenced to death in 1947 for murdering more than 20 Dutch Jews. His sentence was later commuted to life in prison.

He escaped from a Dutch prison in 1952 and fled to Bavaria, where he later became a German citizen.

Dutch authorities spent more than 50 years trying to extradite Faber back to the Netherlands, but were frustrated by German laws and court rulings saying there was a lack of evidence against him.

German prosecutors were preparing to arrest Faber and re-open the case at the time of his death.