A child in Texas is the first person known to have died of swine flu outside Mexico, where it may have killed as many as 159 people, BBC reported.
Officials in Washington gave no other details of the patient. Federal health officials had been warning the virus would probably claim lives in the US.
The US earlier confirmed it was treating 64 cases of the virus.
Germany became the latest country to confirm cases of the H1N1 virus, reporting three sufferers.
Swine flu virus kills child in US
