Kolkata: Kolkata and Jharkhand cops, in a joint operation, busted an improvised firearms manufacturing unit in Bokaro in the early hours of Saturday. The Special Task Force (STF) of Kolkata Police, Jharkhand Anti-Terrorism Squad (ATS) and Gandhinagar Police, raided a warehouse in front of Kaberi Marriage Hall at Jaridih Uppar Bazar. Two individuals were caught manufacturing illegal firearms. The entire operation, including exchange of firearms, was being run from the marriage hall. The suspects were identified as Keshav Kumar, 35, from Khagaria, Bihar, and Praven Kumar, 53, from Munger, also in Bihar. Cops recovered an extensive cache of weapons and manufacturing equipment, including six semi-finished pistols, nine pistol bodies, six pistol sliders, and thirteen pistol barrel plates.Additionally, cops seized approximately Rs 1,00,000 in cash and specialised tools used in firearms manufacturing.This marks the 18th successful joint operation by the Kolkata Police STF in neighbouring states in past three years.