BARIPADA: Odisha's Mayurbhanj district, bordering Jharkhand, has been put on high alert to avoid poultry birds carrying HSN1 virus sneaking in from the neighbouring state, said Mayurbhanj CDVO Nityananda Das on Tuesday. Surveillance has been stepped up in the seven blocks of Raruan, Jashipur, Tiring, Bahalda, Gorumahisani, Saraskana and Jamda in the district. Movement of poultry birds within a radius of three kilometers of affected areas has been stopped, sources said.