South Korean police say they've arrested members of a drug-trafficking ring with suspected links to Afghanistan's Taliban insurgents.

A National Police Agency spokesman, says they've rounded up two Afghans, three Pakistanis and four Koreans suspected of having links to the Taliban.

Police believe they've used South Korea as a shipping point to smuggle raw materials for heroin production into Afghanistan.

The police spokesman has told the AFP news agency, the key Afghan suspect admitted he did it at the instigation of the Taliban, but says he himself is not a member of the Taliban.

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