China's customs police seized a total of 789 kilograms of drugs at border crossings and customs checks in 2006, up 65.5 percent year-on-year, a senior police officer said here Tuesday.

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The customs police also investigated 335 cases of drug trafficking, up 91.9 percent over the year previous, said Li Wenjian, deputy head of the anti-smuggling bureau under the General Administration of Customs.