The rebels blew up a primary health centre, a middle school and a community hall late Saturday in Sarodag village of Kaimur, about 160 km from Patna.
''All three buildings were badly damaged. They were blown up by using dynamites. We suspect the buildings were blown up by Maoists,'' a police officer said.
No casualty has been reported.
In a separate incident on Saturday, armed Maoists blew up Kanchanpur middle school in Deo police station area of Bihar's Aurangabad district.