U.S. rockers Bon Jovi have had their first ever tour of China unexpectedly canceled, the Chinese promoter said on Wednesday, and it was not immediately clear why, though a music video of six years ago shows scenes from the 1989 Tiananmen crackdown. Promoter AEG said in short statement on its Weibo microblog that the Sept. 14 concert in Shanghai and Sept. 17 concert in Beijing had been canceled "for some reason". It provided no other explanation and government authorities either declined to comment or could not be reached for comment. The Beijing Culture Bureau declined to comment.