A further outbreak of highly pathogenic avian influenza H5N1 has occurred in China's northwest Gansu province, according to the country's Ministry of Agriculture.

More than 6,200 chickens at a farm in a village in Luyang, a town in Jingtai county, showed symptoms of suspected avian flu on June 1, and 260 of them died. Some 18,460 birds have since been culled to prevent the spread of the disease, and quarantine and movement control measures have been introduced.

The outbreak is the fifth reported by the country’s Veterinary Bureau to the World Organisation for Animal Health since December 2011.