China has reported another flock of bird flu-infected fowl - its ninth outbreak in a month.

The latest outbreak killed poultry in Anhui province.

The announcement came as World Health Organization experts are in China to investigate whether bird flu caused the death of a 12-year-old girl and sickened two other people in Hunan province.

Vietnam also reported new outbreaks of avian flu among birds in four provinces today.

The deadly H5N1 strain of the virus has been found in 10 of the country's 64 provinces and has killed more than 40 people in Vietnam since 2002.

Taiwanese officials are on alert as agriculture officials reported finding a sample of the H7N3 strain of bird flu in droppings left by a migratory bird. The H7 strains are also known to infect humans.