"Whether it was caused by paranoia or a secret naval mission, Sweden's biggest military mobilisation since the Cold War over the last three days has underscored growing concerns about Russian President Vladimir Putin's intentions in the Baltic Sea region.
In just over a month, an Estonian intelligence officer has been reported abducted by Russian forces, Finland has complained of Russian interference with one of its research vessels, and Sweden has lodged an official protest over a "serious violation" when Russian warplanes entered its air space.
With shades of Frederick Forsyth, the maritime mystery has fired the imagination of the region. Moscow has denied it has any submarine in mechanical trouble in Sweden's waters, but nervous governments fear that the Baltic Sea could become the next flashpoint with Russia after Ukraine."
http://uk.reuters.com/article/2014/10/20/uk-sweden-deployment-idUKKCN0I91QV20141020