http://www.thelocal.se/20141017/swed...-off-stockholm
They've yet to talk about what the situation is about, but I've never seen them mobilize this much since a Soviet submarine almost beached itself decades ago.
Update: Military commanders have stated that it's not a submarine hunt, but what they called " an information operation". That's the best I can translate it to.
Many ships, airplanes and helicopters are involved. Different equipment for both underwater and surface surveillance are being used.
Wether it's a show of readiness and force or if they're really acting on information regarding an intrusion is still unclear.