In footage shared widely online on Tuesday, the cluster of dozens of glowing orbs lazily drifts past the orbiting space lab.
The video was captured on a live camera strapped to the station that broadcasts footage of its inky black surroundings 24 hours a day.
It was clipped by Reddit user tyrannosnorlax, who promptly shared it to the social media site – where it has garnered thousands of views.
"Can someone please explain what I just saw on the ISS YouTube live feed?" the curious Redditor asked on the forum.
The footage sparked claims of an alien sighting from a handful of excited commenters.
"Just a whole fleet of aliens...nothing to see here folks," one user joked.
Another said: "Holy f***ing s**t. I have watched a ton of these live feed captures over the years and not one has something like this been seen. Is that really a f***ing fleet of UFOs?!?!?"
To read more and view the video, click here.