Nhan Dan - Bird flu has occurred in Tra Vinh province, announced the Veterinary Department.

The department said that ducks died in Phuong Thach commune, Cang Long district, Tra Vinh province, from June 24.

By July 4, around 1,000 unvaccinated ducks had died. Their samples were tested positive to H5N1 virus.

The local veterinary service culled the ducks.

So far, Quang Ngai and Tra Vinh provinces are yet to be free from bird flu for 21 days.