Maoists fired indiscriminately at a police station in Giridih, blew up a building and set on fire trucks on the Grand Trunk road in the wee hours on Thursday to protest the arrest of their two associates.
A group of armed Maoists attacked the Pirtand Police station around 1 am and started firing at random, Superintendent of Police, A V Homker, said.
The security forces returned the fire, he said, adding there was no casualty.
A couple of blasts were also heard nearby as Maoists destroyed a government building near the police station, he said.
Later, the ultras torched some trucks on the G T Road on the Dhanbad-Giridih border.
Police said the Maoists were protesting the arrests of two of their hardcore associates, Muktar Ansari and Dasrath Manjhi in Giridih on Wednesday.
In stepped up anti-Naxal operations, police have apprehended several Maoists across the state while about ten ultras have surrendered since July.