The <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mw6Q" rel="mw:WikiLink" title="Soviet Union">Soviet</a> nuclear-powered submarine <i id="mw6g"><a href="https://en.wikipedia.org/wiki/Soviet_submarine_K-33" id="mw6w" rel="mw:WikiLink" title="Soviet submarine K-33">K-33</a></i> collides with the Finnish merchant vessel M/S <i id="mw7A">Finnclipper</i> in the Danish straits.