Mr Hummler, who is also chairman of the Swiss daily newspaper Neuer Zuercher Zeitung, has previously been unusually outspoken among Swiss bankers in calling for the country's authorities to block any disclosure of banking client details to the US authorities.

BBC: Swiss bank Wegelin to close after US tax evasion fine

This past March the Swiss daily Neue Zuercher Zeitung reported that Iranian defector Ali Reza Asghari, who before his March 2007 defection to the US served as a general in Iran's Revolutionary Guards and as deputy defense minister, divulged that Iran paid for the North Korean facility.

CENTERFORSECURITYPOLICY: Israel and the Axis of Evil