In a Truth Social post, the U.S. president said his move was based on the "tremendous interest" in the subject, without providing additional details.

Donald Trump has said he will direct the Pentagon and other US agencies to release "government files related to alien and extraterrestrial life".

In a flurry of announcements at the end of a long, winding speech to representatives from 47 nations, Trump said the United States will contribute $10 billion to the Board of Peace.