The video was filmed by a webcam to monitor activities surrounding the Colima volcano in western Mexico.
The flying object – captured on Sunday (January 29) – has not yet been officially identified and viewers of the clip are divided about what it could be.
One LiveLeak user wrote: "Aliens. Definitely aliens. This is the only thing to explain Donald Trump and Theresa May."
Another commented: "It's swamp gas! It's near a volcano!"