Public security officials in Beijing, the Chinese capital and host city for this year's summer Olympics, announced a pre-Olympic drug crackdown Wednesday, according to Chinese state media. Beijing police will secretly search bars for drug traffickers and "addicts" in the run-up to the games, officials declared in a statement.

The two-month campaign will apparently target bars and clubs popular with young people and foreigners, which police complain are becoming a popular venue for drug use and trafficking. If bar-goers or owners are found to be involved in drug-related activities, they will be investigated, said Zhao Wenzhong, head of the Beijing Municipal Security Bureau's drug control department.

The Chinese aim to create a "drug-free" environment for the August Olympics, Zhao said.

The crackdown has been underway for some time, but is being ramped up for the Olympics. According to Fu Zhenghua, deputy head of the bureau, more than 20 Beijing bars and clubs have been closed after being found to be involved in drug use or trafficking.

Less than two weeks ago, Beijing police raided two bars in the Sanlitun night-life district, detaining scores of young people, including numerous foreigners, covering their heads with bags, and taking them to police stations for drug tests. That led to complaints by the foreigners' parents of "Chinese torturing foreign teens in drugs bust." Chinese authorities reported they had arrested 20 people, including eight foreigners, for possession of drugs including ecstasy, marijuana, and unspecified "other drugs."