UFO Crash In The Baltic Sea?

Using side-scan sonar, a research team found a 60-meter diameter
cylinder-shaped object, with a rigid tail 400 meters long at the bottom
of the Baltic Sea. On another pass over the object, the sonar showed a second disc-like shape 200 meters away.
Is it a spaceship, a Russian warship or an ordinary stone formation?
It looks like it's been down there for a long time. Would the WWII theories
and Russian warship explanations suffice? It looks startlingly like
the Millenium Falcon spacecraft from Star Wars. Could this be evidence
of ancient alien visitations from the distant past?

Also interesting to note that since the initial discovery researchers
have not been able to get back into the area to explore this more
thoroughly due to Russian and US military presence. They are presumably
conducting excercises in the area.