With the elections approaching, political temperatures are rising in West Bengal. Chief Minister Buddhadeb Bhattacharjee on Tuesday lashed out at Railway Minister and Trinamool chief Mamata Banerjee for accusing the CPI(M) of being the cause for the couple of fatal railway mishaps in the state. While addressing a rally of the Communist Party of India-Marxist in Kolkata, Bhattacharjee slammed Mamata for playing a blame game.