"A butcher is also shy of Narendra Modi. Will this man become the PM of India?," Prasad said.
His remarks come in the backdrop of a no-holds barred war of words between Tinamool Congress (TMC) and BJP.
TMC had hit out at Modi on Sunday calling him the "Butcher of Gujarat", in an angry retaliation to his attack on West Bengal Chief Minister Mamata Banerjee.
"Butcher of Gujarat air-dropped into Bengal. He has no answers to Bengal's development model. So, making personal attacks," TMC Spokesperson Derek O'Brien had said in one of a series of his tweets lambasting the BJP Prime Ministerial candidate.
"The Butcher of Gujarat could not take care of his own wife. How will he take care of this great nation?," he had said in another tweet.
TMC took on Modi after he fired salvoes at Banerjee in his public speeches by raking up the Saradha scam and had accused her of breaking the dreams of the people of Bengal. He had also passed sarcastic remarks on sale of Banerjee's paintings.