The World Health Organization says an 11-year-old girl in Cambodia has died from bird flu. It is urging all countries to be more vigilant.
The WHO had announced on Friday that the girl and a member of her family were infected with the H5N1 bird flu virus.
The organization says it is collecting information and conducting an investigation in the country. It also says it is communicating closely with the Cambodian government.
The H5N1 bird flu strain can cause respiratory symptoms. The WHO says it is taking the situation seriously, as the death rate was more than 50 percent in the past.
It also says the global situation is worrying, given that the virus has been detected in birds all over the world. It adds reports of infection cases involving humans and other mammals have been increasing.