The Hunt For a Russian Nuclear Submarine

Russia denies there is a Russian sub off the coast of Sweden but Swedish government isn't convinced.
1:36 | 10/21/14

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Transcript for The Hunt For a Russian Nuclear Submarine
And to a puzzle that seems like it's right out of the cold war. The hunt is on tonight for a possible Russian submarine. Sweden is convinced it is in their waters. Look at this. It's an image. There is a Russian submarine lurking below? ABC's chief foreign correspondent terry Moran tonight on the search and what the Russians are now saying. Reporter: Somewhere underneath these waves, the Swedish government believes an intruder lurks. Perhaps a Russian submarine. It's a cold war game of cat and mouse, just like the one in that movie "Hunt for red okts." Do we have any surface contact? No contact, sir. Reporter: For four days, Swedish Navy vessels equiped with powerful sonar and anti- submarine weapons, have scanned the countless bays and inlets here. But so far, just a few fleeting, tantalizing clues. This photo, taken by a civilian outside Stockholm -- is it a partially submerged sub? An encrypted communications, the Swedes claim they intercepted to a Russian base on an emergency frequency. If there is a submarine in trouble that could be a nuclear powered submarine, that's very close to Swedish waters, then that could be a very serious problem. Reporter: Moscow is denying everything. But the Swedes aren't buying it. Like so many of Russia's neighbors, they don't trust Vladimir Putin. And so, this October hunt will continue.

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