Arwal (Bihar) [India], February 23 (ANI): In a joint operation, West Bengal police and Bihar police unearthed two illegal improvised firearms manufacturing units at Radhey Bigha Village in Bihar’s Arwal district, on Friday. Twelve persons were arrested and several firearms and live cartridges were recovered, said the police. “Today early morning, on the basis of intelligence developed by STF KP (Special Task Force Kolkata Police), a joint raid was conducted by Special Task Force -Kolkata Police along with Special Task Force -Bihar and Arwal District Police, Bihar in the houses of Roshan Kumar …