Residents of the Mesa, Arizona, area have reported seeing mysterious lights in the sky, and none of them are quite sure what they mean, ABC-15 Arizona reports.

But of course there are theories.

What’s going on: There appears to be a giant orb hovering in the sky in Mesa, according to ABC-15. The giant orb reportedly drops flares onto the ground, too.

What they’re saying: DJ Maier and Kerri Burnett told ABC-15 they saw a “pretty bright light” that “was about straight up over here, and it went straight that way, stopped, and it didn’t seem like it was too far.”

Burnett: “It started moving kind of diagonal across, I was trying to figure out which way it was heading, and that’s when we noticed it started dropping things from it.”

“It started moving kind of diagonal across, I was trying to figure out which way it was heading, and that’s when we noticed it started dropping things from it.” Maier: “And it wasn’t just us, our neighbors next door they were out, they weren’t even filming. They were more in amazement, like statues, just watching it.”

“And it wasn’t just us, our neighbors next door they were out, they weren’t even filming. They were more in amazement, like statues, just watching it.” Maier: “Some said it may be an aircraft, others said aliens or a comet.”

Officials remain uncertain what the orb could be. The Federal Aviation Administration, Luke Air Force Base and the Army National Guard all said they didn’t know what the object was, according to KPAX.

Arizona: Something must be going on in Arizona. A green fireball lit up the sky Sunday night, too, which had social media going wild, according to 12 News.