An eight-year-old Indonesian boy has died from the H5N1 strain of bird flu.
An Indonesian Health Ministry official said local test results had yet to be confirmed by a Hong Kong laboratory affiliated with the World Health Organisation.
However, "based on the results, local tests show he is positive for bird flu," he said.
Indonesia has had nine deaths from bird flu confirmed by the Hong Kong laboratory and five cases where patients have survived.
Besides the boy, Indonesia is also awaiting confirmation from Hong Kong of local tests which showed a 39-year-old man died of bird flu last week.
It was unclear if the boy, who died in Jakarta last week, had contact with infected chickens, Wibisono said.
Since late 2003, the H5N1 virus is known to have killed 71 people in five Asian countries -- Indonesia, Thailand, Vietnam, China and Cambodia -- and almost all are believed to have caught it from infected fowl.
The highly pathogenic H5N1 strain is hard for humans to catch and remains essentially a virus in birds. However, scientists fear it could mutate into a form that could pass easily from human to human.
The United Nations urged Jakarta to take steps to halt the spread of the disease.
"We are losing the battle against this particular avian influenza outbreak. It is a very nasty bird flu virus," David Nabarro, the UN coordinator for avian influenza, told Indonesian officials at a meeting in Jakarta.
"Act as though a pandemic influenza will start tomorrow. Don't think we can wait around and not worry it won't start for six months or one year," Nabarro said. "Once, it starts it is too late to prepare."
Children would be the most vulnerable group, he said.
Jakarta has designated dozens of hospitals across the country for treating patients with bird flu symptoms, set out plans to produce the anti-viral drug Tamiflu and vaccinate poultry in a bid to stop the spread of the disease.