Maoists blew up a panchayat building used for accommodating security forces during anti-Naxal operations in Orissa's Malkangiri district early on Friday. About 100 armed rebels stormed into Malabaran village and blew up the building with landmines, Inspector In-Charge of Motu Police station, Mr S.K. Taoria, said. The Maoists shouted anti-government slogans before disappearing into the forests, he said. Additional forces were rushed to the village to launch combing operations. About a dozen panchayat buildings, schools and godowns have been destroyed by the ultras so far this year.