Calcutta, Dec. 4 :    Calcutta, Dec. 4:  Four policemen of the Intelligence Branch were roughed up at Tiljala on Sunday by members of a local vigilant party, who mistook them for dacoits. Around 10.30 pm, five policemen of the IB went to a multi-storeyed building in Tagore Park. As soon as their Tata Sumo stopped, members of an RG party closed in. Sensing trouble, the driver drove off. This confirmed the RG party's suspicion. They chased and caught four of them. The policemen tried to establish their identity but failed. Some 'outsiders', who had joined the argument, started to heckle them. They were left locked in a room. The local police later came and rescued them. 'We had come to reach some household items to Mahendra Sharma, a colleague, who has recently taken a flat on rent here. We did not bring our identity cards as we did not foresee such harassment', one of the five said. 'Some days ago, seven persons came to this house in a Tata Sumo and asked the caretaker to keep silent. But we reached on time. Yesterday's incident took place due to a misunderstanding. How could we believe them without any proof of identity?' an RG party member countered. Jugal Kishore Mukherjee, officer-in-charge of Tiljala police station, said on Monday: 'Last night's problem could have been avoided if the local people were not so aggressive.'