BEIJING, Jan. 24(Xinhuanet)-- Chinese police seized 11.1 tons ofdrugs in the nationwide anti-drug campaign between May and Nov. in2004, official said here Monday.

During the period, Chinese police closed 34,851 drug-related criminal cases, toppled 2,186 gangs involved in producing, trafficking or taking drugs, and captur ed 34,719 suspects, said Yang Fengrui, an official with China's Ministry of Public Securityat a press conference.

Official statistics showed that of all the drugs seized by the police, there are 6.66 tons of heroin; 1.14 tons of"ice" drug, ormethamphetamine hydrochloride; 549 kg of opium; and 1.42 tons of marijuana.

Police authorities also confiscated 20 tons of poppy capsules, 61 tons of chemicals used as drug-making materials, 159.46 millionyuan, 461 vehicles, and 92 small weapons used for drug trafficking.