South Korea confirmed a second case of African swine fever (ASF) at a pig farm near the border with North Korea on Sept. 18, just one day after reporting its first-ever outbreak of the virus, Reuters reports.

The Ministry of Agriculture, Food and Rural Affairs said in a statement last week the second case was detected at a farm in Yeoncheon, northwest of the capital Seoul, where 4,700 pigs had been raised.

The ministry said all of the pigs at the Yeoncheon...