Kolkata (Agencies): Describing it as a cause of grave concern, the Bharatiya Janata Party (BJP) on Tuesday sought an explanation from the UPA government on alleged tapping of over one lakh telephones across the country.

Stating that this amounted to misuse of power, opposition leader in Rajya Sabha Arun Jaitley said, "The government has to confirm that tapping is being done on consideration of security and also state how many phones are being tapped.”

"It is a cause of grave concern. The country's law states that tapping can be done in extreme cases like security considerations or in case of a serious crime", Jaitley added.

The BJP has sought a clarification from the central government in the same regard.

"The figure is so large that it is frightening and phones are tapped simultaneously by the Centre and the states. We would like to know the exact number of phones being tapped and the ground on which they are being tapped", he said.