A maverick teachers' union has said it will arrange a mock trial for Egyptian Prime Minister Ahmed Nazif and ministers of education and health over the recent death of four inviglators. "The trial will begin after the end of thanwaya amma (secondary school certificate) exams," said Abdel Hafez Tayel, the director of the Right to Education, a non-governmental group. "The charges levelled against the three officials are putting the lives of teachers in danger and failure to provide favourable working conditions to them while engaged in exam supervision." The exams, traditionally associated with dread in Egypt, will end on Saturday. The four teachers died in the southern Egyptian cities of Assiut and Sohag during last week's heat wave.