New Delhi, May 6 (IANS) Accusing the government of misusing the Central Bureau of Investigation (CBI) as a political tool, Bharatiya Janata Party (BJP)-led National Democratic Alliance (NDA) MPs Thursday staged a sit-in in Parliament House premises.

Senior leaders of the NDA, including L.K. Advani, Leader of Opposition in the Lok Sabha Sushma Swaraj and her counterpart in the Rajya Sabha Arun Jaitley and other MPs of the BJP and other NDA constituents attended the protest in front of Mahatma Gandhi's statue on the Parliament House premises.

"The CBI is being used as a political tool. The United Progressive Alliance (UPA) government is using the CBI to protect some of its ministers who are facing corruption allegations," Sushma Swaraj told reporters.

BJP Deputy Leader in the Rajya Sabha S.S. Ahluwalia told IANS: "The government used the CBI to tame some of the opposition parties to vote in its favour during the cut motion."

The BJP has demanded a discussion on the issue in parliament. The ongoing parliament session will conclude Friday.