Maoist rebels attacked a police patrol near a bus shelter in the Chainpur police station area around 11.30 am, police said.
An assistant sub-inspector, a havildar and three constables were killed while the Maoists stole three INSAS rifles, 600 rounds of ammunition and eight hand grenades.
The attack followed Tuesday night's bombing of the Sreeram panchayat secretariat building in Lohardaga in which however, no one was killed.
The escalated violence seemed to be a result of the killing of ten Maoist cadres including some senior leaders in Lakramanda Tola in Kunda block of Chatra district.
The rebels had been killed in a gunbattle with the Tritiya Prastuti Committee (TPC), widely believed to have state backing, that began on March 27.
--IBNS (Posted on 05-04-2013)