Police have seized 91 kilograms of methamphetamine drug aboard a Chinese cargo ship which had entered Busan last month. A police spokesman said it is the largest amount of methamphetamine ever seized in a single drug busting operation. The seized drug is estimated at three hundred billion won or about two-hundred-40 million U.S. dollars. Investigators said the product was manufactured in late October at a factory in China near the North Korean border.