WASHINGTON -- Federal law enforcement officials say the suspect in last night's deadly shooting in Colorado is James Holmes, a 24-year-old American.

Officials believe Holmes killed a dozen people when he fired into a crowded movie theater in a Denver suburb. He was wearing a gas mask and set off an unknown gas in the theater.

Holmes is in police custody, and the FBI says there is no indication that incident is tied to any terrorist groups.

The federal law enforcement officials spoke on condition of anonymity to discuss an ongoing investigation.

Meanwhile, FBI agents and police used a hook and ladder fire truck to reach the Denver suburb apartment window of the suspect Friday morning.

They put a camera at the end of 12-foot pole inside the apartment and were watching footage of what the camera saw on a small television screen.

Television video showed an officer in a helmet and vest atop the fire truck boom smashing the window of the third-floor apartment where Holmes lives.

The apartment is about four miles from the theater where at least 12 people were killed and 50 were wounded.

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