Were aliens behind the sudden explosive activity of this volcano?
Conspiracy theorists say this intriguing video footage shows a cigar-shaped UFO flying past the mouth of the Colima Volcano in Mexico just as it erupts.
The strange, thin disc is seen passing quickly through the sky just as smoke and lava begins to spew from the top of the mountain.
It appears to pass through or behind the smouldering magma before exiting through the other side and continuing to fly off.
The mysterious footage has sent UFO hunters into a spin.
Ufologist Scott C. Waring believes it shows an alien spacecraft performing a pick-up or drop off at an extra-terrestrial hideaway deep within the volcanic chamber.
"The UFO passes over and through the lava shot up from the mouth of the volcano," he wrote.
"As it gets above the mouth there is a bust of light and all goes black. The UFO then flies away.
"I believe that as the UFO went over the mouth, it transported someone or something to or from the underground base below the volcano."
If conspiracy theorists are to be believed, cigar-shaped UFOs are on something of a tour of Earth at the moment.