Authorities confirmed new cases of bird flu in eastern India on Sunday, a month after they slaughtered nearly four million birds in the same state to stem the country's worst ever outbreak of the disease, AP reported. State workers were preparing to kill birds that may have been infected in villages in West Bengal, officials said. Roughly 900 birds have died of the deadly H5N1 strain of the virus over the past week in two villages where bird flu was previously confirmed, said local official Subir Bhadra. The villages are 300 kilometers (185 miles) from the crowded state capital of Calcutta.