This document describes four cases of academics working in higher education who have been detained without trial in Sudan since the military government seized power in June 1989. They are: Dr Ushari Ahmed Mahmoud, lecturer in languages at the University of Khartoum and director of an Arabic teaching institute; Dr Khalid Al-Kid, writer and lecturer in politics at Ahlia University, Omdurman; Dr Faruk Kaduda, economist and Head of the Economics Department at Ahlia University until his arrest; Dr Bashir Omar Fadlalla, economics lecturer at the University of Khartoum and member of the Umma Party. He has held ministerial posts in previous governments.