Bulgarian Food Safety agency staff euthanised 65 pigs in the village of Tutrakantsi in the Varna district on September 1 after tests confirmed an outbreak of African Swine Fever in the village.
Disinfection was being carried out and police had up set up posts to control entry and exit from the village, reports from the area said.
The suspected African Swine Fever infection in Tutrakantsi was reported to the agency on August 30.
Food Safety Agency staff were taking samples from the neighbouring village of Bozveliysko, which falls into the three-kilometre risk zone.
The results of these tests are expected in a few days, pending which the quarantine of the village will remain in place.
Bulgarian Agriculture and Food Minister Roumen Porozhanov said that everything was being done to establish how the infection had reached Bulgaria.
In Bulgaria’s northern neighbour Romania, more than 120 000 animals have been killed following a large-scale outbreak of African Swine Fever. The outbreak started about a month ago.
Bulgaria put up a fence at its land border with Romania to attempt to stem the spread of African Swine Fever into its territory, while authorities put in place various other measures against the infection.