Preecha is considering whether to declare Phichit the bird flu zone, local newspaper Bangkok Post reported.

Thawatpong Paekwamdee, chief of Taphan Hin district of the province, said that test result of carcasses of chickens raised by a villager were found to have the H5N1 virus. The local authorities have killed 90 chickens within 1-km radius from the location.

Transportation of birds is prohibited in the area unless receiving authorization from authorities, who are keeping a close watch on the spread of the virus within 5-km radius.