Assuming these pictures are legitimate, two of the images look like 'Tic-Tacs,' and the third appears to be metal spheres.
Edit:
It's hard to tell from the still image, but the metal spheres appear to be in a triangle formation. However, it's complete speculation without a longer video to accompany it.
Yeah, I've been looking into posts about that. I've been hoping to find a video, but haven't been able to so far. I assume they're fairly stationary or slow moving, so people feel a few photos would suffice.