About 30 men, mostly African or Caribbean, were detained and beaten during an apparently racially targeted anti-drug operation by Beijing police, the South China Morning Post reported. Among the men were students, tourists and the 22-year-old son of the Grenadian ambassador to China. Uniformed police and security guards swept through Beijing's nightlife district, Sanlitun, apparently targeting only black men. Policemen and guards detained and beat black men who eyewitnesses say were not resisting arrest. Some of the men were later released without charge. The Grenadian ambassador's son was sent to hospital with a concussion. "Obviously I'm very angry," the ambassador said. "My son was arrested and beaten for no reason whatsoever. I will be taking this up with the authorities and looking into the matter." A police officer at Sanlitun station said that the incident was part of an anti-drug operation.