A police perimeter was established around the Embassy for about three hours while medical and police units were mobilized. Traffic was blocked in some nearby streets, resulting in temporary chaos downtown. Some Embassy staff members exposed to the envelope were taken to a medical facility for observation.
The stir turned out to be a false alarm when the powder was discovered to be mere flour. The U.S. State Department published a statement that the envelope was part of a campaign which has extended to Embassies in 14 other European cities. They have also received similar envelopes containing the same innocuous substance, from the same sender in Texas.
