Former Bihar Deputy Chief Minister Tejashwi Yadav today attacked the BJP and the ruling NDA for not fulfilling its promise of giving special package to the state. He also urged Chief Minister Nitish Kumar to follow TDP's Chandrababu Naidu and leave the coalition for the benefit of the state. Talking to a TV Channel on alleged anti-India slogans raised after the victory of RJD in Araria bypolls, Mr Yadav said he would not like to comment on the issue as it is a matter of investigation now.