A U.N. expert on Tuesday called the dumping of chemical residue in Ivory Coast a clear violation of international hazardous waste agreements. Seven people have died from exposure to the waste, the Health Ministry said, and 44,000 people have sought treatment at hospitals... The waste was shipped to the port city of Abidjan by a vessel chartered by commodities trader Trafigura Beheer BV and was dumped -- apparently illegally -- across the city. On Monday, Ivorian authorities arrested two executives with the Dutch company on charges of poisoning and breaking toxic waste laws. Trafigura has said that it acted lawfully and that the Ivorian contractor which dumped the material was certified to process waste.