Representatives of the International Criminal Court arrived in Tripoli on Sunday to try to secure the release of a detained delegation visiting Muammar Gaddafi's captured son, a Libyan official said. The four-member delegation was being held in the western mountain town of Zintan after one of its lawyers, Australian Melinda Taylor, was found carrying documents regarded as suspicious for Saif al-Islam Gaddafi, a Libyan lawyer and a militia member said.