Didn't take long for videos to surface on YouTube:
Update: Russia Today now reports 900 injuries. More details and additional video here.
Meanwhile, up in space: An asteroid will make a close pass to Earth later today.
PASADENA, Calif. -- NASA Television will provide commentary starting at 11 a.m. PST (2 p.m. EST) on Friday, Feb. 15, during the close, but safe, flyby of a small near-Earth asteroid named 2012 DA14. NASA places a high priority on tracking asteroids and protecting our home planet from them. This flyby will provide a unique opportunity for researchers to study a near-Earth object up close.