Human rights organisations have called for the urgent deployment of an international fact-finding mission in Sudan, led by the United Nations and the African Union, to investigate what they call is a repression of protesters. At least 100 people are thought to have been killed in the crackdown across Sudan, which has been under military rule since President Omar al-Bashir was ousted in April.   The organisations say the international community  should hold those responsible to account and also consider targeted sanctions against the perpetrators.