The mesmerising cloud looks similar to a hexagon and seems almost too perfect to be caused naturally, according to conspiracy theorists.

The incredible cloud formation was spotted on Wednesday morning over the Scandinavian country and quickly uploaded to social media by people who snapped it.

One person wrote on Twitter: “It is clearly a UFO”

Another added on Facebook: “For a certain cloud formation that's not too common we sure are seeing them often. I'm finished accepting what ‘they’ want us to believe so from here on out we must question everything.”