Four more persons were arrested on Monday in connection with two engineers' death in Bihar's Darbhanga District.
The Police had yesterday detained six persons in connection with the double murder.
Bahera Police Station SHO Ramashankar Singh was suspended and an inquiry was initiated in the case.
Two engineers of a private road construction company were on Sunday shot dead by unidentified two motorcycle-borne assailants. The deceased project engineers were identified as Brajesh Kumar and Mukesh Kumar.
