Police have arrested Birbal Sao, a native of Mayurhund block and Jhaman Kumar of Lawalong, in connection with the killing of the journalist last week, Superintendent of Police, Anjani Jha said.
Jha said the two were being interrogated.
Akhilesh Pratap Singh (35), who worked for a news channel, was shot dead by unknown assailants near Dewaria panchayat secretariat on May 12, triggering widespread condemnation of the attacks on journalists across the country.
Chief Minister Raghubar Das had condemned the incident and sought an action-taken report from Director General of Police D K Pandey.
A bandh was observed in Chatra town on May 13 in protest against the killing.