The discovery of swine flu in birds in Chile raises concerns about the spread of the virus, the UN warns.
Last week the H1N1 virus was found in turkeys on farms in Chile. The UN now says poultry farms elsewhere in the world could also become infected.
Scientists are worried that the virus could theoretically mix with more dangerous strains. It has previously spread from humans to pigs.
However, swine flu remains no more severe than seasonal flu.
Safe to eat
Chilean authorities first reported the incident last week. Two poultry farms are affected near the seaport of Valparaiso.
