South Korea has confirmed bird flu in ducks on a poultry farm near Seoul, a month after the country regained its bird flu-free status, an official from the Agriculture Ministry said on Monday.
The case involved a strain known as H5N8, the same type of influenza that occurred last November in the country.
Officials say all 11,604 ducks in the poultry farm, in the city of Icheon, 80 kilometres (50 miles) east of Seoul have been killed to prevent the spread of the virus.
The country was declared an Avian Influenza-free and have started poultry exports to Hong Kong after two years.
The bird flu discovery comes amid ongoing concerns about food safety in South Korea, where an outbreak of foot and mouth disease was discovered in pigs in January.
The World Health Organisation says that human cases of bird flu remain uncommon, with sporadic cases occurring following exposure to infected poultry or a contaminated environment. It says there is no evidence of sustained human-to-human transmission of bird flu.