A heavy meteor shower rained down on central Russia on Friday, sowing panic as the hurtling space debris smashed windows and injured dozens of stunned locals, officials said. Television footage showed morning traffic grinding to a quick halt in the Urals city of Chelyabinsk as a blinding flash lit up the blue sky, causing some to huddle in buildings for safety. A medical source said that 100 people came to hospitals for medical treatment, while the emergencies ministry confirmed that cellular telephone communications were temporarily cut.