Hasan, who is also the principal of Oasis School - one of the five examination centres which media reports said had leaked papers - said a gang, and the courier company that transported the papers, could be involved in the leak. The boxes, which had two digital locks each, were opened after they reached the examination centres, the question papers were found sealed in seven layers of plastic, Hasan added. The plastic seals were found defective and Hasan said the question papers could have been opened beforehand.
