The aid group Medecins Sans Frontieres (Doctors Without Borders) is pulling out of Darfur after three of its workers were kidnapped in the war-ravaged Sudanese region.The Canadian nurse, Italian doctor and French coordinator were seized at a clinic by armed men along with two local colleagues who were later released. MSF said it was withdrawing from Darfur to the capital Khartoum. The Sudanese foreign ministry has said the three volunteers were thought to be in good health, but gave no other information. The kidnappings further complicate humanitarian operations in Darfur after last week’s decision by an international court to issue an arrest warrant against the Sudanese President. Omar al-Bashir responded by expelling a number of foreign aid agencies working in the west of the country. He denies the war crimes accusations made in the warrant.