Bird flu outbreaks have recently occurred in Vietnam's northern Nam Dinh province, raising the total number of localities currently affected by the disease to three.
The disease has killed 210 out of a flock of 400 fowls raised by a household in My Loc district, Vietnam News Agency on Wednesday quoted head of the provincial veterinary agency Ninh VanHieu as saying.
To prevent bird flu spread, the agency has culled all the flock of poultry, isolated the affected area, and disinfected the farm.
However, the Department of Animal Health under the Vietnamese Ministry of Agriculture and Rural Development has yet to confirm the outbreaks in Nam Dinh.
Now, bird flu is hitting northern Cao Bang province and central Quang Tri province, it noted.
Bird flu outbreaks in Vietnam, starting in December 2003, have killed and led to the forced culling of dozens of millions of fowls in the country, according to the department.