Delhi police said that the Central Board of Secondary Education exam papers were circulated in 10 WhatsApp groups with more than 50 members each including private tutors, students and parents.

Delhi Police Crime Branch is questioning admins of these WhatsApp groups.

Meanwhile, a complainant Chandan Gupta said that on 27 March, at 10:40 pm, he made a call to police control room regarding paper leak.

"I informed them that I had received a question paper. The source of the exam paper leak should be traced. I was questioned by the police that day and they are doing further investigation now," Gupta said.

Delhi Deputy Chief Minister Manish Sisodia has written to Union Human Resource Development Minister Prakash Javadekar, requesting him to convene a day-long brain storming session of education minsters so that such incidents do not happen in the future.    -- ANI

IMAGE: Congress workers hold placards and protest against the alleged paper leak outside CBSE headquarters in New Delhi on Friday. Photograph: Kamal Kishore/PTI Photo