Vietnam’s Long An province has been struck by an outbreak of the H5N1 bird flu virus, which has killed thousands of chickens in the area.

According to Long An’s Department of Agriculture and Rural Development, the virus has hit farms in the Long Son commune located in the Can Duoc district, Khmer Times reported. One of the farms lost around 3,600 ducks to the virus.

Birds have been culled by local government agencies, and areas affected have undergone disinfection and been isolated in order to stop the spread of the virus.

Long An is not the only province affected by the virus in recent months. Towards the end of October 2018, Hon Dat District in the Kien Giang province recorded three cases of H5N1, Viet Nam News reported. About 750 chickens were culled, with samples taken testing positive for H5N1.

According to the country’s Ministry of Agriculture and Rural Development, Vietnam has had no reported human cases of H5N1 since 2014.