The UFO-shaped object has been found at the bottom of the Baltic Sea. The object, lying at the end of a 1,000ft runway, was covered in soot, with “little fireplaces,” the Daily Mail newspaper reported Saturday.

Divers found that the object, which some have likened to the Millennium Falcon because of its unusual round outline, was raised about 10-13 feet above the seabed and curved in at the sides, giving it a mushroom shape, according to the newspaper published in Britain.

They added that the object has “rounded sides and rugged edges.”

“First we thought this was only stone, but this is something else,” diver Peter Lindberg said in a press release.

At the center of the object, which has a 60-meter diameter, has an “egg shaped hole leading into it from the top.”

Surrounding the hole, they found a strange, unexplained rock formation. Adding fuel to the speculative fire, they said that the rocks looked “like small fireplaces” and the “stones were covered in something resembling soot.”

“Since no volcanic activity has ever been reported in the Baltic Sea, the find becomes even stranger,” Lindberg continued.

A brief video clip of the dive was released to Swedish-language paper Expressen and can be viewed on Gizmodo, the Daily Mail said.