HO CHI MINH CITY, Jan. 7 (Xinhua) -- An H5N1 bird flu outbreak has happened in Vietnam's southern Long An province, hitting fowls in a commune, the provincial Department of Agriculture and Rural Development said on Monday.

The H5N1 virus has recently infected and killed hundreds of chickens and ducks raised by a family, and killed 3,600 ducks raised by another family in Long Son commune, Can Duoc district.

Local relevant agencies have culled sick poultry, isolated and disinfected areas hit by the disease, tightened control of fowl transport in the affected areas and nearby ones, and intensified bird flu vaccination among flocks of chickens and ducks, the department said.

Vietnam has detected no new human cases of H5N1 infection since 2014, according to the country's Ministry of Agriculture and Rural Development.