BRUSSELS (AFP) - NATO has launched its first anti-piracy mission off Somalia after one of its warships successfully escorted a cargo ship to the port of Mogadishu, the alliance's chief said Monday. "One NATO ship just finished escorting a ship which was bringing in supplies" for the Burundi section of the UN-mandated African Union peacekeeping mission in Somalia, NATO Secretary-General Jaap de Hoop Scheffer The escorted ship was expected to dock on Tuesday, with similar escort missions to follow swiftly, he added. "The operation is moving well," Scheffer told reporters at a joint news conference with EU foreign policy chief Javier Solana. Three NATO ships have been given the go-ahead to use force under their rules of engagement and in line with international law. They are an Italian destroyer, the lead ship that carried out the first operation, and British and Greek frigates that form NATO's operation Allied Provider. They will mainly help escort UN World Food Programme (WFP) food shipments, tempting targets for pirates, until the European Union can launch its own operation, probably in December. The WFP ships 30,000 to 35,000 tonnes of aid into Somalia each month.