In the sting Operation Duryodhanaby the Noida based media firm Cobrapost, aired December 12, 2005 on the Indian Hindi news TV Channel Aaj Tak, Mahajan was caught on video accepting bribes of Rs. 35,000 for fielding questions in parliament.
On December 23, 2005 a Special Committee of the Lok Sabha found him guilty of contempt of the House and following a motion calling for the expulsion of all 11 MPs caught in the sting, he was expelled from Parliament.