A number of strange unidentified flying objects were spotted by the Navy in restricted airspace southeast of Virginia Beach nearly every day for two years beginning in 2015, former Navy Lieutenant Ryan Graves told CBS.

Graves is actually one of several military members to speak publicly about these UFO sightings, recorded on camera and analyzed by the U.S. Defense Department for several years now. There does not appear to be any answers at the moment.

“I am worried, frankly. You know, if these were tactical jets from another country that were hanging out up there, it would be a massive issue,” Graves tells Bill Whitaker in an interview airing Sunday on 60 Minutes. “But because it looks slightly different, we’re not willing to actually look at the problem in the face. We’re happy to just ignore the fact that these are out there, watching us every day.”

New U.S. Navy footage of spherical shaped UFOs filmed off the coast of San Diego

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He added that pilots who have seen the UFOs have speculated they may be secret U.S. technology, or perhaps even a “spy platform” being used by another country. Or, just maybe, it could be something else entirely.

“This is a difficult one to explain,” Graves said. “You have rotation, you have high altitudes. You have propulsion, right? I don’t know. I don’t know what it is, frankly.”

That said, Graves did not rule out the idea that the UFOs could be could be a Russian or Chinese technology.

“I would say, you know, the highest probability is it’s a threat observation program,” he said.

This content was originally published here.