Scott C Waring, editor of ufosightingsdaily.com, says a reported increase in UFO sightings means the world leaders behind an alleged cover-up over alien contact will no longer be able to keep it quiet.

According to data from the National UFO Reporting Center (NUFORC), UFO sightings around the world have reached an all-time high.

US-based NUFORC, an organisation that keeps a database of alleged sightings, says its statistics show people in the US are more likely to report a UFO sighting.

Mr Waring wrote in a blog about the increase: "The internet has caused many things to change in our world.

"One of them being that more UFO sightings are being reported daily than ever before.

"It's my estimate that over hundreds of UFOs per day are being seen by thousands of eyewitnesses, but still only a few of them report the sightings.

"Evidence is growing on a daily basis, which will one day confirm that aliens exist.