(ANSA) - BELGRADE, JUN 17 - The United States Customs and Border Protection (CBP) announced that it has issued an order to block shipments of copper and copper products manufactured in Serbia by the Chinese company Zijin (Zijin Copper D.o.o.) and seized several shipments due to allegations of forced labour in production. The decision, which was also reported by several local media outlets, including Radio Slobodna Evropa (the Serbo-Croatian version of Radio Free Europe, or RFE), takes effect immediately. (ANSA).