A second, more sensitive test on a letter sent from Malaysia to a Microsoft office has come back negative for anthrax, state officials said Friday. A third test was planned for Saturday.

No one has tested positive for the disease or become ill, officials said.

State and county health officials interpreted the results differently.

``With our latest test results, it is probably not anthrax,'' said Barbara Hunt, Washoe County district health officer. ``The risk appears to be very low.''

http://www.nytimes.com/aponline/nati...ax-Nevada.html