HANOI, Feb. 6 (Xinhua) -- Bird flu hit two more provinces of Vietnam, southern Soc Trang and central Nghe An, apart from the previously-reported infected southern province of Ca Mau, an official at the Vietnamese Ministry of Agriculture and Rural Development confirmed with Xinhua on Friday.

    According to Friday's People's Army newspaper in Vietnam, more than 500 ducks raised at a farm in Soc Trang Province died early this week. Samples of dead ducks have been found positive to the H5N1 virus.

    The nearby province, Bac Lieu, is now in the high risk of bird flu outbreak, said the newspaper.

    In Nghe An province, nearly 200 ducks bred at a local farm died recently. To prevent further spread of the disease, the local animal health officials have intensified measures such as sterilizing the affected area and providing more vaccine for local breeders.

    Previously, southern province Ca Mau reported the reemerge of bird flu, causing more than 2,000 ducks culled so far.