Hong Kong leader John Lee has called for full information from British authorities on the arrests of three men, including a manager at a Hong Kong government office in the U.K., who were charged with assisting Hong Kong's foreign intelligence service.

Speaking to reporters Tuesday, a day after the men appeared in a British court, Lee confirmed that one of the men, Bill Yuen, was a university classmate who was photographed with Lee in a group graduation photograph in 2002.

Lee cited a statement from the Chinese Embassy in London rejecting what it called "the U.K.'s fabrication" of the case and its "unwarranted accusation" against the Hong Kong government.