LONDON - The World Health Organization is working with the Cambodian authorities after two confirmed human cases of H5N1 bird flu were found in the country among one family.

Describing the situation as "worrying" due to the rise in cases in birds, mammals and humans, Dr Sylvie Briand, the director of epidemic and pandemic preparedness and prevention, told reporters in a virtual briefing that WHO was reviewing its global risk assessment.

The U.N. health agency last assessed the risk to humans from avian flu as low.

(Reporting by Jennifer Rigby; Editing by Jon Boyle)