Maoists blew up a school building in Jharkhand's Chatra district early on Tuesday morning on the second day of their two-day Jharkhand-Bihar shutdown.
"A group of armed Maoists packed dynamites inside the Nawadih Middle School and triggered the blast, damaging its three rooms," Superintendent of Police, DB Sharma, told reporters in Chatra.
CPI (Maoists) have been observing a 48-hour shutdown to protest the Centre's alleged efforts to put down their campaign by force.
The police have tightened security with the personnel manning vital points including, patrolling of railway tracks at several places in naxal-pockets.
The shutdown has impacted rural Jharkhand, affecting transport and production of various minerals while buses remained off road to avoid damage to life and property.
However, the bandh failed to evoke any response in urban areas.