HONG KONG, May 29 — A Hong Kong secondary school principal has resigned after a video showing him swearing at security guards during a student trip to Singapore sparked...

San Wui Commercial Society Secondary School says sorry, stressing that the matter will be handled with utmost seriousness.

Dr John Tse, executive director of Hong Kong Initiative for Diversity, says it is difficult to determine if Lee Cheuk-hing’s behaviour is racially motivated.