Hong Kong action superstar Jackie Chan’s actor-son Jaycee Chan has been detained in Beijing on drug-related charges.

The 31-year-old is the latest high-profile celebrity to be ensnared in one of China’s biggest anti-drug crackdowns in two decades.

Jaycee Chan, 31, was detained last Thursday together with the 23-year-old Taiwanese movie star Kai Ko, Beijing police said on their official microblog, identifying them only by their surnames, ages and nationalities. It was unclear why the detentions were announced several days later.

Police said both actors tested positive for marijuana and admitted using the drug, and that 100g of it were taken from Chan’s home.

Jaycee Chan’s management, M’Stones International, apologised to the public on his behalf for the “social impact” caused. It said they would “supervise his rehabilitation and help him return to the right path”.

Illegal drug use has ballooned in China in recent decades

Several celebrities have been detained on drug charges following a declaration in June by President Xi Jinping that illegal drugs should be wiped out and offenders would be severely punished.

In Beijing alone, more than 7,800 people have been caught in the crackdown, police said.

Chinese state broadcaster CCTV aired footage of a police search of the younger Chan’s home in Beijing in which he is depicted, his face pixellated, showing officers where he stashed bags of marijuana.

Police said they acted on a tip-off from the public.

Chan is accused of accommodating drug users, an offence that carries a maximum sentence of three years’ imprisonment – a far more serious charge than that of drug consumption. Two other people detained in the same case were accused of selling drugs while Ko is accused of drug consumption.

China named Jackie Chan an anti-drug ambassador in 2009.

Ko, the Taiwanese star, was part of an anti-drug campaign two years ago, CCTV reported, showing footage of the campaign in which he joins other celebrities in a chorus declaring: “I don’t use drugs.”

Ko, whose real name is Ko Chen-tung, became a sensation after his 2011 film You are the Apple of my Eye, a box-office hit in Taiwan. He won best new performer award for his role in the coming-of-age movie at the Golden Horse awards in Taiwan, considered the most prestigious in Chinese-language cinema.

Illegal drug use has ballooned in China in recent decades, after being virtually eradicated following the 1949 communist revolution. Narcotics began to reappear with the loosening of social controls in the late 1980s.

In more recent years, rising wealth and greater personal freedoms have been accompanied by a growing popularity of methamphetamines and the party drugs Ecstasy and ketamine.

They are often bought on social media forums and consumed in nightclubs, leading to periodic police crackdowns.

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