The villagers were confined in their houses before the ultra triggered off dynamites at a government school and a church-run school in the wee hours of Monday, Mar 29.
The Maoists reportedly escaped into the forests after the blasts.
Police said that the building were damaged. However, there were no reports of casualty.
Security has been tightened in the area and raids have been launched to trace and apprehend the ultras, police added.