South Korean authorities have destroyed thousands of ducks at four southern farms, after discovering what they call a "low pathogenic" strain of the bird flu virus.
Officials say the virus turned up on a farm near the southern city of Gwangju, about 250 kilometers south of Seoul. As a precaution, they destroyed 3,800 ducks on that farm and more than 12,000 at three other farms in the area.
This case of bird flu is a strain, known as H7 that is not highly contagious to humans.
