Mamata vs Maoists war intensifies. Maoist posters have been found at West Bengal food minister Jyotipriya Mallik's office in Kolkata today. A pocketful of posters demanding the immediate shut down of new ration outlets in Jungalmahal areas and threatened to kill the minister.The posters were left on the table of Mallick's personal assistant's chamber.Mallik said he had no idea that how the posters entered his office. He said the posters also warned West Bengal Chief Minister Mamata Banerjee.