In Orissa, Maoists blew up a newly constructed school building in Gomphakunda village in Malkangiri district early today morning protesting US President Barack Obama's visit to India.More than 50 armed Maoists blew up the double storey of the school building by landmines. However, no one has been injured in the incident. Some Maoist posters were also found from the spot saying the blast has been triggered to protest Obama's visit to India.Meanwhile, the Maoists also killed two at Timanpur village under Raighar block of Nowarangpur distrit of Orissa during the bandh call.