India is taking unprecedented measures to restore confidence in its national student examination system after a series of scandals fuelled angry protests from young people and put pressure on Prime Minister Narendra Modi’s government.

Last month, authorities took the extraordinary step of cancelling the medical entrance exam results of more than 2 million students after allegations of widespread leaking of the papers.

For the retest on June 21, the government will deploy the Indian Air Force (IAF) for the first time ever to transport question papers, according to officials familiar with the matter.

Individuals involved in setting the exams would be kept under strict surveillance with restricted access to phones and communications, the officials said, asking not to be identified because the details were not public.

Modi’s government is trying to curb the fallout of the entrance exam scandal as a separate controversy involving erroneous school marks linked to a new online system simmers.