Three men have been arrested in Iraq on charges of trafficking eight priceless ancient artefacts, as the war-torn nation clamps down on a burgeoning black market. The men were foiled after trying to sell one item for $160,000 to an undercover intelligence officer of the Iraq Army 12th Division, just outside the northern city of Kirkuk. A fourth trafficker is yet to have been caught by the police. Among the treasures was the bust of a Sumerian king, local army chiefs told Associated Press. All of the objects date from the region's Sumerian era, between 4,000 and 2,000 BC. Major General Abdul Amir al-Zaidi told reporters the sting was based on information from local residents, and stressed the Iraqi authorities' commitment to retrieving vital artefacts in the face of civil unrest: "The duty of Iraqi army is not only to chase the terrorists but also to protect state treasures," he said.