Kolkata, Feb 13 (IANS): An investigation has been ordered into circulation of a portion of the first day's question paper of Bengali first language of the secondary (Madhaymik) examination, conducted by the West Bengal board, on the social media on Tuesday, an official said.

The examination, however, has not been cancelled.

"Our Deputy Secretary received a message on Whatsapp with an image of the first page of the day's question paper at 1.43 p.m. Following this, we lodged an FIR with the Bidhannagar cyber crime department of police," West Bengal Board of Secondary Examination (WBBSE) president Kalyanmoy Ganguly told a press meet.

The source of the image is yet to be traced, he said.

On the shortcoming in the system, Ganguly said: "This is not lack of vigilance, but a habit of not to stay away from mobile phones. I will strictly ensure that no one carries cellphone to the examination venue."

Ganguly said when the incident occurred students were inside the examination hall.

"They won't be benefited in any manner from the incident. Thus there is no question of the examination being cancelled. The culprit will be not be spared and students should focus on the next examination and should not worry," he said.