The images were taken on Christmas as Zeifman flew near the US Air Force's secretive flight test center in Nevada.

The pilot shot the images from his small Cessna 150 plane while flying with the permission of air traffic controllers supervising the tightly controlled airspace.

His route took him insight of the Nevada Test and Training Range (NTTR) which is part of the Area 51 installation.

It comes as the Pentagon and spy agencies are set to reveal what they know about UFOs in the next six months.

In December, President Donald Trump signed a $2.3trillion Covid-19 relief and government funding bill.

Thanks to an act included in the bill, federal agencies must publish a report within the next six months.

The provision wasn't included in the text of the 5,593-page legislation, but as a "committee comment" attached to the annual intelligence authorization act.