A big meteorite, tens of tons, exploded near Chelyabinsk, a city near Ural mountains, causing a shockwave which smashed a lot of windows and left 250 people injured. News in English here, they have a video as well (though they've replaced the audio track, since the original one contained what the driver really said when he saw that). Some yellow press already reported (Russian link, use Translate) that it was actually UFO crash, citing Federal Meteorology Service. It worth noting that "Guys from Chelyabinsk" is a meme here, close to a meaning of Chuck Norris meme with the addition of Detroit flavor. So jokes about St. Valentines firework and locals playing soccer are queued already.