Britain's Prince Charles reportedly compared the recent actions of Russian President Vladimir Putin in Ukraine to those of Adolf Hitler.
British media reports said several witnesses heard the prince make the comment on May 19 to Marienne Ferguson, a 78-year-old who fled the Nazis aged 13 and lost family members in the Holocaust.
Ferguson told the media that Charles, heir to the British throne, said, "...Putin is doing just about the same as Hitler."
Charles met Ferguson during a tour of the Canadian Museum of Immigration in Halifax, Nova Scotia, as part of a four-day trip to Canada with his wife, Camilla.
He is due to meet with Putin during D-Day commemorations in France on June 6.
Clarence House, the official residence of Prince Charles, said it would not comment on a private conversation.
Based on reporting by bbc.com and dailymail.co.uk