Efraim Zuroff, the chief Nazi hunter with the Simon Wiesenthal Centre, has welcomed the arrest of Hans Lipschis over allegations he served as a Auschwitz death camp guard.
Lipschis number 4 on his current list of "most wanted Nazi war criminals".
Mr Zuroff told the Associated Press: "This is a very positive step, we welcome the arrest. I hope this will only be the first of many arrests, trials and convictions of death camp guards".
More top news
A campaign to remove the term 'Essex Girl' from the dictionary due to its sexist and derogatory connotations is gaining traction.
The legendary Brazilian, who has died at 72, scored one of the most iconic goals in football history as he led his team to World Cup glory.
A "torpedo" filled with 165lbs of cocaine with a street value of £4.4 million has been found on an Irish beach close to a tourist hotspot.