Indonesia has had two more deaths from the H5N1 strain of bird flu confirmed by a laboratory in Hong Kong to bring the total to seven in the country.
An official from the country's health ministry said the tests were from a 20-year-old woman who died last weekend and a 16-year-old girl who died last week.
China announced yesterday that a woman in eastern Anhui province had died from the H5N1 avian flu strain that was suspected in the death of a 12-year-old girl last month in southern Hunan.
A World Health Organisation (WHO) official has warned that China is likely to suffer more outbreaks of bird flu among poultry and possibly among people in coming winter months after confirming its first cases of human infection.
Experts and health officials are becoming increasingly concerned about H5N1, which made the first known jump to humans in Hong Kong in 1997, infecting 18 people and killing six.
The WHO says the virus, like many influenza viruses, is steadily mutating, and it also appears to have expanded its host range, infecting and killing mammal species previously considered resistant to infection with avian influenza viruses.
Hong Kong said it was increasing surveillance at border crossings with mainland China.