Yahoo News has reported that some 25,000 pro-democracy protesters in Moscow’s Bolotnaya Square had an unexpected participant in their demonstrations on Saturday when a UFO was caught on video above the crowd.

Several demonstrators in the crowd espied the hovering object, with reflecting blue and red lights. Descriptions of the object, which observers say was definitely not a helicopter, included:

“Five extended tendrils or pylons emanating from the body of the vehicle.”

The UFO — which many speculate may not be from OUT OF THIS WORLD, but of a more homegrown design — was in sight long enough for some protesters to climb trees for a better look.

Reporter Vitaliy Matveev has speculated that it might be a Russian government spy drone (like the one pictured left) or simply a news media camera filming the protests:

“Well, being among those tens of thousands of ‘confused onlookers.’ the only kind of debate I can recall in regards to the “object” was whether it was the police monitoring the security situation on the scene of mass protests through a drone camera or journalists taking aerial photos for their reports (or broadcasts)… despite standing quite far from the place above which the drone was hovering, I could still clearly see what it was, and so could the others.”

So what is this mystery object? A not-so top secret government surveillance device or a strange probe from another world?