Patna: Students are disappointed and frustrated after the Central Board of Secondary Education (CBSE) on Wednesday cancelled the board Class X mathematics and Class XII economics papers on Wednesday because of reports of the question papers being leaked.

The CBSE announced on Wednesday afternoon that the board will re-conduct examinations for the two papers and that the board will announce the fresh examination dates within a week. Sources said that the CBSE Delhi office has also lodged a police complaint in this connection.

Earlier too there were reports of the Class XII accountancy paper being leaked. The CBSE, however, denied that leak.

"We had never heard about question paper leak in CBSE examination," said a Class X student of St Michael High School who refused to reveal his identity.

"If such practices continue there will be no difference between the CBSE and the state examination board."

The student said the Union government should deal strictly with such organised gangs who are involved in question paper leaks, jeopardising the future of lakhs of students.

Echoing the views of the St Michael's student, Sanya Sinha, a Class X student of Notre Dame Academy said: "It is shocking that the mathematics papers has been cancelled. The paper was easy and scoring and the questions were according to the syllabus."

Sanya said she was confident of getting cent percent marks in the paper, and the cancellation of the paper leak is disappointing.

"Even if the CBSE conducts the examination afresh, students should be given marks in best out of two papers, as for many students today's paper was easy and scoring," Sanya said.

"It is very discouraging for students. This is the first time such a thing has happened for CBSE board examinations," she added

She said she came to know about the cancellation of mathematics paper after she came out of the exam hall after taking the exam.

Sources said that both Prime Minister Narendra Modi and Union HRD minister Prakash Javadekar have taken strong cognisance to the leak.

Around 16.40 lakh candidates are taking the Class X examination this year while around 12 lakh candidates are appearing in Class XII examinations.