Kolkata, Jan 8 (Reporter) West Bengal ruling TMC leader Narendra Nath Tiwari, accused of killing Malda district vice-president Dular Sarkar on January 2 near his house under the English Bazar police station, was on Wednesday arrested, official sources said. District police grilled Tiwari, also the president of Malda Town TMC unit, as one of the prime suspects in the brutal killing of Dulal Sarkar on Thursday morning, and finally arrested him early today, along with another suspect Swapan Sharma. Police said so far seven suspects have been arrested in the killing of Dulal Sarkar. Two more suspects Babloo Yadav and one Rohan were still at large. Sources said the assailants were the "supari killers" in the murder in which Dulal Sarkar, who was shot four times by as many gunmen, who came on two motorcycles. Widow Chaitali Sarkar alleged the factional feud was behind the crime of her husband, and demanded the real suspects were still at large. The day Sarkar was shot dead, party supremo and chief minister Mamata Banerjee said her close associate and TMC councillor Dulal Sarkar alias Babla was murdered...////...