Maoists blew up three school buildings in Giridih and Palamau districts in poll-bound Jharkhand and a state-run school in Aurangabad district in neighbouring Bihar, police said on Tuesday.

A group of Maoists late last night triggered a blast at Manjiladih Primary School in Jharkhand's Giridih district destroying the school building, district Superintendent of Police Ravi Kant Dhan said today. A police team has been rushed to the spot, he added.