"It was on advice of Sushil Modi to a hurt Nitish Kumar that the dinner for BJP leaders was cancelled in 2010," Rajak told PTI.
He further claimed that after calling off the dinner, the food that was to be served to the BJP leaders at the dinner was despatched to a posh hotel where they had it.
Modi was the Deputy Chief Minister during NDA rule in Bihar.
But, the CM had refused to identify anybody by name.
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Prime Minister Narendra Modi had expressed hurt feeling over the episode during his rally at Muzaffarpur rally on July 25.
BJP leader C P Thakur, who was Bihar BJP President in 2010, told PTI, "I had advised the party to sever ties with JD(U) over the issue (cancellation of dinner) but some state BJP leaders were against it."
Told that minister Shyam Rajak has identified Sushil Modi as advising Kumar to cancel the dinner, Thakur, a Rajya Sabha member and who served as Union minister in the NDA government of Atal Bihari Vajpayee, did not corroborate it.
"I did not hear any name at that time before cancellation of dinner," he said.