Three people, including two teachers, were detained by the Delhi Police on Sunday in connection with the Central Board of Secondary Education (CBSE) question paper leak which has affected around 28 lakh students of Class 10 and Class 12.

Officials from the Crime Branch, which is investigating the case, reportedly detained the three after raids at various places across Delhi-NCR on Saturday. One of them is runs a coaching centre in the national capital.

A principal and six teachers of three public schools were questioned by the police on Saturday. The investigation team had also visited CBSE building in Preet Vihar locality to question officials and inspect documents as part of the probe.

On Saturday three individuals were arrested in Chatra region of Jharkhand. The Jharkhand Police had also detained nine minors in connection with the leak of Class 10 mathematics paper and Class 12 economics paper.

CBSE officials are also under the scanner. Police have not ruled out the possibility of an insider hand in the leaks and are trying to get to the source.

Google identifies sender

Following a request from the Delhi Police, Google identified the sender of the mail which alerted CBSE chairman Anita Karwal about the leak.

Police are now questioning the man who sent the mail to find out how he got the papers.

Read More: CBSE paper leak: Google helps Delhi Police to identify sender of alert

He said the SIT has already written to WhatsApp Headquarters in California, seeking its help “to revive the deleted chats and messages shared on these groups, has also got some details which are being examined with Cyber experts”.

Protests

Students from across the national capital continued their protest against the leak.

The affected students and their parents say the leakage of maths and economics question papers for Class 10 and 12 respectively has hit them badly.

Read More: Students, Congress protest outside CBSE headquarters

Many who had been looking forward to holidays or preparing for entrance examinations would now have to cancel their plans until the tests are held again.

Re-examination

Amid nationwide protests over the leak, the government on Friday said re-examination will be held for Class 12 economics paper throughout the country on April 25 while fresh test for Class 10 maths paper will be held only in Delhi, NCR and Haryana, “if at all”, in July.

Admitting that “some wrong” has happened, Anil Swarup, Secretary, School Education, in the Union Human Resource Development Ministry, said the CBSE Class 10 mathematics question paper was leaked only in Delhi and Haryana as there was no evidence that it was a pan-India affair.

In a press conference held on Thursday, Union HRD Minister Prakash Javadekar claimed that the leaks happened half-an-hour before the examinations.

Javadekar said he felt sorry for the students who had been caused the trouble due to the leak and assured that those guilty would be arrested soon.

“This incident is unfortunate. We are also parents. I understand what the students are going through. Hence, those responsible will not be spared,” he said.

The question papers of Class 10 mathematics and Class 12 economics were leaked on social media around half an hour before the exams on Wednesday.