Sudan is reported to have ordered two senior UN officials to leave, amid tensions between Khartoum and the peacekeeping mission in the western Darfur region. A UN spokesperson, who spoke on condition of anoymity because he was not authorised to speak to the media, said Ali Zaatari and Yvonne Helle were ordered to leave on Thursday. Zaatari has been UN resident coordinator at the United Nations Development Programme (UNDP) while Helle worked as the...