Authorities in India's northeastern Assam state culled 40,000 poultry of some 60,000 infected birds after a bird flu outbreak in the state.
Culling operations were started in nearly 50 villages in central Kamrup district since last week, said Manoranjan Choudhury, an official of the state veterinary department.
The culling operations were expected to complete by 22 teams in the next three days.
India's Health Ministry had confirmed the bird flu outbreak after laboratory tests found strains of the deadly H5N1 bird flu.
Meanwhile, the local government in India's eastern state of Orissa sounded an alert and asked agencies to take measures to prevent a similar bird flu outbreak.