Acting on a tip off, the police intercepted a speeding three-wheeler on the Gandhi Setu (bridge) and arrested Srikant Rai, Superintendent of Police (SP) Suresh Kumar Chaudhary said.
Rai and his supporters had shot dead Jurawanpur police station's Officer In-Charge and another person Sudhir Kumar in the police station premises on January 2 last while the slain cop was brokering truce between the prime accused and others over a property dispute, he said.
Raids were being carried out to nab three other accused, the SP said.