Authorities have found African swine fever in the bodies of two wild boars found dead Saturday near the border with North Korea.
According to the environment ministry, they were found in Cheorwon County, Gangwon-do Province.
So far, the virus has been found in five wild boars.
The government said it's unlikely that the boars themselves came from North Korea, but it's possible that the virus came from the North indirectly.
The environment ministry has been carrying out regular check-ups on wild boars since African Swine Fever broke out in China late last year.
At South Korean farms, there have been 14 cases of the disease since last month.