In signs of a widening rift in Bihar's ruling coalition, Lalu Yadav's son Tejashwi Yadav today skipped an official event in Patna where he was to share the stage with Chief Minister Nitish Kumar. Mr Yadav's nameplate on the dias was first covered with a cloth, apparently by Mr Kumar's party JD-U, and then finally removed. The development has strengthened speculation that the crisis between the Nitish Kumar's party and the Lalu Yadav's Rashtriya Janata Dal has further deepened over allegations of corruption against the RJD chief and his family. The Chief Minister has indicated that he would prefer his deputy Tejashwi Yadav to exit the government if unable to present a rebuttal to the CBI's charges against him.