STRANGE cloud formations in Cadiz have fuelled claims that UFOs conceal themselves when visiting Earth.

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ARE WE ALONE?: UFO-shaped clouds hit Cadiz

Despite the satisfactory scientific explanation that the formations are what are known as lenticular clouds, which usually warn of storms, die-hard ‘ufologists’ believe they are in fact masking alien visits.

Editor of ufosightingsdaily.com Scott Waring said some flying saucers can produce a cloud-like substance around them so they can hide themselves while watching us on planet Earth.

Lenticular clouds have been behind alleged UFO sightings around the world, from Indonesia to Florida.