A dozen of pigs in the northern province of Kampaengpetch in Thailand have died with unknown cause.

The 12 pigs belonged to a farm of a local villager in Ban Kon Tai in the province's Muang district, the Thai News Agency reported Tuesday.

"They had died one by one since July 25, and three more are dying," the owner of the pig farm, Klin Jabpeng said.

"The pigs suffered from high fever, cough, swelling eyes, and breathing difficulty," he disclosed.

Klin said that he had reported the incident to his village's head, who is reporting to local livestock officials.

Early this year, Klin said, all eight chickens in his farm died from bird flu, together with several more of his neighbors' farms.

Source: Xinhua