11.   Another student took the envelope to the principal, and the powder was tested and determined not to be an illegal drug.

12.   Berlin police took the envelope away for testing for anthrax and other biological agents, spokesman Hans-Joerg Draeger said.

13.   Moscow public health officials then took the envelope away for testing, it said.

14.   The fire department took the envelope away in a sealed plastic bag.

15.   The envelope was taken to a lab for analysis.

16.   The envelopes were taken from a distribution center for Liban Post, a semiprivate company, before being delivered, the officials said.