Congress's Kapil Sibal, who has been under fire from party colleagues over his remarks criticizing the party leadership, has refused to officially respond to the attacks. Sources close to him, however, said he had expressed surprise on being attacked for not campaigning in the Bihar elections. The attack came from the party's leader in the Lok Sabha Adhir Chowdhury. "Had Kapil Sibal gone to Bihar and Madhya Pradesh, he could have proven that what he is saying is correct and that he strengthened the position of Congress," Mr Chowdhury had said.