The embassy was briefly evacuated after a suspicious envelope sparked an alert . A U.S. official said the package addressed to Brennan had been sent from California and contained white powder that tested positive for ricin. Stockholm police will examine the contents of the envelope in a secure place . The all-clear has now been given , CNN affiliate TV4 reports .
The embassy was briefly evacuated after a suspicious envelope sparked an alert . The envelope contained white powder , Stockholm police said . Stockholm police will examine the contents of the envelope in a secure place . The all-clear has now been given , CNN affiliate TV4 reports .