South Korean residents near the North Korean border uncovered a long stream of blood flowing toward one of Seoul's main freshwater sources earlier this week. The blood stream was the result of a mass pig culling gone wrong. South Korean officials killed over 47,000 pigs thought to have been infected with a highly contagious and incurable African swine fever.
The swine fever virus has wreaked havoc across pig populations in Asia and Europe. South Korea has already had to cull over 300,000 pigs since the virus crossed the border from North Korea in September.
Fearing the contaminated blood water would infect the Imjin River, South Korean officials swiftly swooped in and built dikes and used pumps to halt the blood.