FILE PHOTO: Iqbal Khan, former CEO International Wealth Management of Swiss bank Credit Suisse attends the company's annual shareholder meeting in Zurich, Switzerland April 26, 2019. REUTERS/Arnd Wiegmann/File Photo

ZURICH (Reuters) - Credit Suisse CSGN.S Chairman Urs Rohner apologized to the bank's former wealth management head Iqbal Khan for an "inappropriate surveillance operation" ordered by the bank's chief operating officer, who had to step down.

“We do not condone personal surveillance on employees as part of our compliance,” Rohner told a media conference on Tuesday, expressing his and the board’s confidence in Chief Executive Tidjane Thiam, who was cleared by the internal investigation.

He also said Credit Suisse was afflicted by the death of a security expert working for the bank, but did not give further details.