A former Air Force intelligence officer, during a Congressional hearing, has claimed that the United States conducted a "multi-decade" program that collected and attempted to reverse engineer crashed UFOs or Unidentified Flying Objects, AFP reported. The Pentagon has denied his claims.


Major David Grusch (retired), who investigated UFOs within a US Department of Defence agency until 2023, testified on Wednesday to Congress.


Grusch said he "absolutely" believes the US government was in possession of UAPs -- which has replaced the term UFO in official parlance -- as well as remains of their non-human operators, AFP reported.



"I was informed, in the course of my official duties, of a multi-decade UAP crash retrieval and reverse-engineering program," Grusch said.


"I made the decision, based on the data I collected, to report this information to my superiors and multiple inspectors general, and in effect becoming a whistleblower," he further said.


However, Grusch said he has not seen any alien craft himself and his claims were based on "extensive interviews with high-level intelligence officials".


When asked whether the US government had information on extraterrestrial life, Grusch said the US was likely aware of "non-human" activity since the 1930s.


Grusch told lawmakers that "non-human" biologics were recovered by the government, but he had never seen an alien body.


He also claimed to have information of "people who have been harmed or injured" in the course of government efforts to conceal UFO-related data. 


The Pentagon has denied Grusch's claims of a coverup, AP reported. Investigators have not discovered "any verifiable information to substantiate claims that any programs regarding the possession or reverse-engineering of extraterrestrial materials have existed in the past or exist currently", a Defence department spokesperson said in a statement.


National Security Council spokesman John Kirby, when asked about extraterrestrial objects, told AFP, "What we believe is that there are unexplained aerial phenomena that have been cited and reported by pilots -- Navy and Air Force. We don't have the answers about what these phenomena are."