Aurora, Co (KUSA/KSDK) -- KUSA-TV obtained audio recordings from the Colorado theater shooting.
During the audio, you can hear first responders calling for gas masks as they responded to the Century 16 Movie Theaters at the Aurora Town Center.
Twelve people died in the shooting and at least 38 people were injured, according to Aurora Police Chief Dan Oates. Oates said 10 died at the theater and two died at the area hospital.
The new Batman movie called "The Dark Knight Rises" was opening at the theater during the shooting.
NBC News has confirmed through two federal sources the shooting suspect's name is James Holmes. He is 24 years old.
Police said Holmes "appeared" at the front of one of the theaters, threw some type of gas or explosive device and started shooting. Police recovered a rifle, a handgun and a gas mask when they arrive on the scene. Another gun was discovered later inside the theater. Holmes was wearing a bulletproof vest, according to federal authorities.