The U.S. government has received more than 700 reports of unexplained phenomena but have found no proof of extraterrestrial life, the Pentagon’s UFO office confirmed at a Thursday briefing.

The Pentagon has received hundreds of reports of new UFO sightings, including “several particularly interesting cases,” according to the director of the office that investigates these reports, but reiterated it found no evidence of alien activity.

The Pentagon released a report that concluded there is no verifiable evidence of extraterrestrial beings among nearly 300 cases of “unidentified anomalous phenomena,” more commonly known as UFOs.