PM Narendra Modi was in the stronghold of Mamata Banerjee, there he launched an scathing attack on Mamata Banerjee. While addressing the masses, PM Narendra Modi said that, had I been not come here, I would have never known what wave looks like. He also said that Chief Minister Mamata Banerjee is a speed breaker in the development of West Bengal. PM Narendra Modi accused Mamata Banerjee of creating hurdles in the development work in West Bengal. PM Narendra Modi said, earlier, the left used to create hurdles in the devlopment of West Bengal, now, Mamata Banerjee has taken their weapons. Watch video for more updates.