NAIROBI, Kenya?White powder in a letter mailed from Atlanta to a Kenyan has tested positive for anthrax spores, the health minister said Thursday, apparently the first case of tainted mail outside the United States since the Sept. 11 attacks.

Health Minister Sam Ongeri told a news conference that the unidentified recipient, a doctor who lives in Nairobi and four family members ?may have come into contact? with the spores and were being tested, but they are ?not in danger.? The powder was undergoing further tests at a government lab, he said.

It was unclear whether U.S. investigators had asked to be involved in the Kenyan cases, though Ongeri said his department was ?perfectly capable? of handling the situation itself.

White powder was found in two other letters which were also being tested.