Central Board of Secondary Education Chairperson Anita Karwal received a mail containing 12 pictures of a handwritten question set of the Class 10 mathematics examination at 1.39 am, hours before the test on Thursday, The Indian Express reported quoting a First Information Report filed in the paper leak case.

The sender asked the CBSE to cancel the exam as the paper had been leaked. However, the test was not cancelled as the authorities feared a “law and order” situation. The board has announced that it will conduct both exams afresh.

The Delhi Police’s Crime Branch asked the CBSE to share with it the full contents of the e-mail. The crime branch on Friday also sought a reply from Google about the email, CNN News18 reported.

The first FIR in the case was filed on March 27 after the CBSE said that the Class 12 economics paper had been leaked. “We have questioned at least 25 persons, including 11 schoolchildren, seven college students, five private tutors and two individuals [about the paper leaks],” Special Commissioner of Police (Crime) RP Upadhyaya told The Indian Express.

On Thursday evening, the police questioned nine more people. Meanwhile, the Jharkhand Police detained six Class 10 students from Chatra for their suspected involvement in leaking the papers.

Protests against the CBSE intensified in Delhi on Friday. The Congress’ Delhi unit and its youth wing the National Students Union of India joined demonstrations outside Udyog Bhawan, News18 said. The protestors tried to breach the barricades put up by the Delhi Police.

Section 144, which prohibits the assembly of more than four persons, was imposed near Human Resource Development Minister Prakash Javadekar’s residence on Kushak Road, ANI reported. NSUI President Fairoz Khan said he had met Javadekar with some Class 12 students. The HRD minister said that re-examination dates would be declared by Friday evening, Khan claimed.