From AP, :
HELSINKI, Finland (AP) — United States embassies in northern Europe said they have received “threat information” and urged Americans living in the Nordic and Baltic regions to be cautious.
In the rare warning for Americans in the region, the State Department urged all citizens “to be vigilant as to their surroundings, especially in centers of ground-based mass transit, and to report any unusual or suspicious persons, incidents or circumstances” to authorities, the embassy’s Web site in Helsinki said.
The warning, posted late Saturday, gave no other details.
“The information is as specific as we can make it at this time. If we had more specific information for American citizens, we would of course release it,” embassy spokeswoman, Victoria Middleton, said on Monday.