A secretive Pentagon UFO data retrieval program has been hidden from Congressional oversight since 2017, a new report claims.

Whistleblowers assert the program — codenamed 'Immaculate Constellation' — was established to 'detect' and 'quarantine' the military's best UFO imagery, as well as its best videos, eyewitness testimonies and electronic sensor evidence.

This trove of high quality, multi-sensor UFO data is so tightly held that 'talking about it will put you in the danger zone,' according to a US official who confirmed the leak.

The quite literally 'above top secret' program allegedly sprang into action in the wake of the 2017 leak of three, still-as-yet unexplained US Navy infrared UFO videos.

A Pentagon spokesperson denied the existence of the program Tuesday evening, telling reporters: 'The Department of Defense has no record, present or historical, of any type of SAP [Special Access Program] called 'IMMACULATE CONSTELLATION.''

To read more, click here.