Kolkata: The sleuths have got some important clues in connection with Howrah arms factory. Sources informed that police personnel, who went to Bihar, came to know that the house in Howrah had became the workshop for manufacturing small firearms. The materials were supplied from Munger in Bihar.According to the sources, after interrogating the three accused persons, police came to know that Munger is the hub for such firearms manufacturing. They were supposed to hand over the finished firearms to someone who would take those to Munger. Later, the firearms would be sold to its customers. Also Read – Rain batters Kolkata, cripples normal lifeAfter getting all the information, the sleuths suspect the arms racketeers might be using West Bengal as a manufacturing hub. They also came to know that to avoid any kind of suspicion, arms racketeers used to receive only small orders. If big orders came, it would be divided into several parts. The members of the manufacturing units were asked to keep a strict vigil on the locality whether they were being monitored. They were also instructed to stop manufacturing work completely for a few days if necessary. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThough police received some valuable tip off, they could not trace any one from Bihar in this case. Howrah Police has arrested three persons identified as Md Anwar, Md Sohel and Md Niraj Ansari on Tuesday evening from Gangaram Bairagi Lane in Howrah. During a search operation, police found 40 finished and 30 unfinished pistols and other apparatus related to firearms manufacture. The trio were arrested immediately. Sources informed that the accused persons are from Munger in Bihar. The trio had hired the house a few years ago for the purpose of a lathe factory. During day time, they used to do normal work and at night, they used to manufacture fire arms.