A mysterious shape has been spotted in satellite images from Area 51 sparking speculation it could be a top secret US aircraft at the infamous base.

Photos taken by the satellite imagery firm Sentinel Hub appear to show a large unidentifiable object sitting at the end of a runway near a large white hanger.

Twitter sleuth Ruben Hofs shared the satellite images - which were taken on August 1 - and said he believes the object cannot be just a shadow.

He wrote: "Could this be a blackproject? or is it just a wet spot or a shadow on the taxiway?"

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