( CNN ) -- The U.S. Embassy in Stockholm , Sweden , was briefly evacuated Wednesday after an alarm was raised over a suspicious envelope containing white powder , Stockholm police said . Stockholm police are moving the envelope to a secure location in order to examine it , police spokesman Albin Navery said . `` The embassy has been evacuated and we are working with Swedish authorities to investigate the incident , '' a U.S. State Department official told CNN . All employees are accounted for , the official said . The all-clear has now been given and staffers have begun to return to the building , CNN affiliate TV4 said . CNN 's Saskya Vandoorne and Jamie Crawford contributed to this report .
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 .