Batman US cinema shooting: Fourteen dead in Denver.
Seems they just went in there and started gunning people down. Details are a bit sketchy right now. Figures ranging from 9 to 14 dead. At one point they called in the bomb squad, but it may have just been tear gas.
Live coverage: http://www.9news.com/video/9newsonline.aspx
Also: Why the hell were people bringing their kids to watch The Dark Knight Rises?