Updated at 6.45pm: More than a million dollars worth of falsely-labelled merchandise has been seized at the mainland border, the Customs and Excise Department said on Friday. On Wednesday customs seized 21,109 pairs of women's jeans with false labels worth $1 million. There were found in an incoming container at Man Kam To Control Point. Customs believe the jeans were to be sent to the United States via Korea. On Thursday officers also found 7,680 woven backpacks with false origin labels from another container at Lok Ma Chau Control Point. The backpacks, worth about $600,000, were also believed to be US-bound. A Customs spokesman said no arrests were made. ''We are still looking into the case and have no evidence to detain anyone.'' The department said it has warned garment manufacturers that importing falsely-labelled goods was a serious offence. Under the Trade Descriptions Ordinance, the maximum penalty is a $500,000 fine and five years imprisonment.