Patna: A Jharkhand police team arrested two more suspects from Bihar's Supaul district on Monday night for their alleged involvement in the leak of question papers of the Central Board of Secondary Examination (CBSE).

Acting on a tip-off, a police team from Jharkhand's Chatra district reached Supaul and conducted raids in search of two students, who had appeared at the Class X examination conducted by the CBSE this year.

The students are cousins. The Telegraph is withholding their names as they are underage and their guilt is yet to be established.

With this, the total number of students arrested by the Jharkhand police has gone up to 11, four of them from Bihar.

A member of the visiting police team attached to the Hunterganj police station in Chatra said both students had appeared at the recently concluded examination from a private school in Patna.

The police traced the students with the help of the location of their mobile phones, which were allegedly used to receive and forward the question paper via WhatsApp on March 27, a day before the mathematics examination.

During interrogation, the students, both residents of Khagaria, are learnt to have told the police that they had received the question paper from one Prince Kumar, who was earlier arrested from Patna's Ram Krishna Nagar police station area.

The duo is also understood to have revealed the names of other suspects in the case. "Altogether seven students were preparing for the examination at a private lodge in Patna. They all had received the question paper from Prince, who was in touch with the racketeers operating in Delhi," an investigating officer said quoting the arrested students.

The officer said that after the leak was discovered, both students had fled to Supaul where the mother of one of them is employed at a primary health centre. The police have questioned her.

Supaul superintendent of police Mritunjay Kumar Choudhary said the arrested students have been taken to Jharkhand on transit remand. "We handed have them over to the Jharkhand police team after completing legal formalities," he told The Telegraph over phone on Tuesday.

On Friday night, two students were nabbed from a private lodge at Ram Krishna Nagar in Patna. Seven other students have been arrested from Jharkhand. Also in custody are Pankaj Singh and Satish Pandey, both directors of Study Vision coaching school in Chatra, and Hamesh, a maths teacher at the centre.

Chatra superintendent of police Akhilesh B. Variar had said on Saturday that the two students arrested from Patna had sent questions of the Class X mathematics paper to their friend in Chatra over WhatsApp.

These were later provided to the directors of the coaching institute, who sold them to examinees at exorbitant rates.

The principal of Chatra Jawahar Navodaya Vidyalaya, Divesh Narain, had lodged an FIR in this connection.

During interrogation, the two Patna students arrested last week reportedly confessed they had links with racketeers of Delhi and had sent the questions to their friends in Jharkhand on March 27, a day before the examination.

"The mastermind behind the racket is yet to be arrested," Variar had told The Telegraph over phone on Saturday.

The matter surfaced after four students were caught using unfair means at the examination held on March 28. The arrested students admitted that they were provided the math question paper a day before the examination.