Maroon 5 were supposed to play in Shanghai and Beijing in September, but both shows were cancelled earlier this week. The promoters Live Nation did not specify a reason for the cancellations, but as the BBC reports, many are speculating that a now-deleted tweet by keyboard player Jesse Carmichael wishing the Dalai Lama a happy birthday may have angered Chinese authorities — in the tweet, Carmichael said that he “sang happy birthday to his holiness.” If that’s the case, it wouldn’t be the first time something like this has happened: just a few years ago, Oasis concerts in China were pulled once Chinese government officials discovered that Noel Gallagher had performed at a Free Tibet concert in New York. Maroon 5 have yet to make any official comment on the incident.