A man opened fire at a Colorado movie theater early Friday morning.
It happened in Aurora at a midnight showing of the latest Batman movie, "The Dark Knight Rises."
Police originally said 14 people were killed and another 50 wounded, but the number of dead was downgraded to 12 people this morning; the number of wounded, 38.
Officers say they arrested a heavily-armed suspect--James Holmes, 24, of Aurora, Colorado, had a rifle and a handgun on him, and they found another gun inside the theater.
ATF (Bureau of Alcohol, Tobacco, Firearms and Explosives) agents are investigating where the suspect got his guns.
They also searched his home and car for explosives.
A source said an "item of interest" was found in Holmes' apartment, but didn't say what it was.
A movie-goer said the shooter was wearing a gas mask and used a smoke bomb before he started moving through the theater, shooting people at random.
Police say there was a lot of confusion after the first gunshots, because many people thought the sounds were coming from the screen.