'I can’t explain what we saw, and I went down there to answer questions, but I came up with even more questions," said Stefan Hogeborn in a statement.

Hogeborn is one of the divers from Ocean X Team, which examined the object on the Baltic sea bed earlier this month.

The strange object, often likened to the Millennium Falcon from Star Wars due to its unusual shape, was discovered in June 2011 by divers using sonar equipment in search of interesting shipwrecks.

What they discovered instead was a large, round formation, and a mystery to boot.

No one has yet been able to explain how the object got there, and several international news stations, including CNN, reported on the bizarre find.