Maoists blew up a state-run primary school at Gerua village in Bihar's Banka district in the wee hours on Wednesday.

Over 100 ultras surrounded the building at around 2:30 am and used dynamites to trigger the explosion, police said. The roofs of the three-room school caved in due to the explosion. The school was adjacent to the Sangrampur block office which was blown up by the Maoists last week.