The Baltic Sea Anomaly was discovered over a decade ago by divers looking for treasure, but it remained a mystery for years as to why and how it got to the bottom of the ocean

A mysterious object found on the floor of the Baltic Sea has baffled explorers for years.

The truth about a strange, unexplained object lying on the floor of the Baltic Sea that prompted UFO claims may have finally been revealed.

The Baltic Sea Anomaly is said to be over 140,000 years old and is thought by some to be formed out of straight and angular pieces of metal. Discovered by divers who were originally searching for a shipwreck, the object has puzzled viewers for years as no one knows for sure what it is or how it got there.

Swedish explorers Peter Lindberg and Denis Asberg were in the northern Baltic Sea as part of the Ocean X team in June 2011, looking for treasure, when their sonar radars detected the 70ft long Millennium Falcon-looking piece in the canyon of an underwater mountain in the Gulf of Bothnia.

The structure was initially discovered by Ocean X divers while on an expedition to find treasure.

Asberg told TV4 in Sweden at the time: “We were really surprised and puzzled. We were thinking what is that we have found here. This is not a wreck. At that time we thought for sure there was a natural explanation.

“We wanted to look into it some more and decided to keep this totally quiet. We contacted geologists, marine biologists and when they said they had never seen anything like this, of course more thoughts were triggered. It could be something really awesome that we’ve found.”

Adding to the mystery of the structure, the explorers explained that there appears to be a long “stair-like formations” leading to a dark hole and another unknown object around 200m away.

The mysterious object has been likened to the Millennium Falcon from Star Wars.

The enigmatic nature of the discovery prompted wide speculation with some guessing it could be the remains of the lost underwater city of Atlanta, a rouge member of an alien UFO fleet that crashed on the sea bed or some kind of anti-submarine device left over from the Second World War.

Despite its resemblance to a large rock, some scientists have said that it’s not made of natural materials and is in fact constructed of metal. Even more mysteriously, electrical and satellite equipment reportedly cuts out when in close proximity to the object, according to Ocean X diver Stefan Hogerborn.

He said: “Anything electric out there, and the satellite phone as well, stopped working when we were above the object, then when we got away about 200 metres, it turned on again.”

Sonar radars used by the divers initially detected the anomaly in 2011 and many have speculated since

Sat nearly 300ft below the surface, the Ocean X team continued to explore the object for years after its discovery, including returning to the scene to produce a documentary in 2016 and taking samples from the site with the intention to find out the truth behind it. However, others have attempted to end speculation, claiming it is simply a natural, geological formation.

Volker Brüchert, a Stockholm University geologist, reportedly studied some of the samples collected by the team and said: “What has been generously ignored by the Ocean-X team is that most of the samples they have brought up from the sea bottom are granites and gneisses and sandstones.”

He believed there is nothing mysterious about it, saying: “I was surprised when I researched the material I found a great black stone that could be a volcanic rock. My hypothesis is that this object, this structure was formed during the Ice Age many thousands of years ago.” Göran Ekberg, a marine archaeologist at Maritime Museum in Stockholm, said: “A natural, geological formation can’t be ruled out. I agree the finding looks weird since it’s completely circular. But nature has produced stranger things than that.”

Scientists have debated about the origins of the object but its said to be a geological formation.

Research undertaken by the Stockholm University later established that the Baltic Sea anomaly is the remains of a process of glacial movements that took place in that area of the ocean in the Ice Age period and could account for how the object reached its location.

Mr Lindberg said at the time: “I have been the biggest sceptic, I was kind if prepared for finding just stone. For me it has been an amazing experience. I think it is very odd in its shape. It is tough to give an explanation as to what it might be exactly, since different scientists have many different theories. Whatever it is, it is something we do not usually find in nature sitting in the dark cold depths of the Baltic Sea.”