U.S. releases more images of unidentified aerial phenomena. See the pictures here.

The U.S. Department of War says this is 'imagery likely derived from an infrared sensor aboard a U.S. military platform operating within the United States Central Command area of responsibility in 2022. A user uploaded this video to a classified network in June 2024.' (Provided image)

The U.S. Defense Department on Friday released a second batch of previously classified files on alleged UFO sightings, including references to people reporting unexplained green orbs, discs and fireballs.

At the order of President Donald Trump, the first batch was made public on May 8. He is the latest president to release U.S. government reports on unidentified flying objects, a disclosure process that began in the late 1970s.

Defense Secretary Pete Hegseth said the documents, photos and videos of what are officially known as “unidentified anomalous phenomena” had long fueled speculation.

“It’s time the American people see it for themselves,” he said in a statement.

• IN PICTURES: Pentagon releases new photos of UFOs

One of the 222 files released on Friday contains 116 pages of documentation relating to a series of reported sightings and investigations in a top secret facility in Sandia, New Mexico, from 1948 to 1950.

“This file contains 209 sightings of ‘green orbs’, ‘discs’, and ‘fireballs’ reported near the military base,” the Defense Department said.

Experts said the first batch contained new videos of known sightings but gave no conclusive evidence of alien technology or extraterrestrial life.