Authorities plan within the next hour to enter the booby-trapped apartment of the 24-year-old student accused of opening fire on a crowded movie theater, killing 12 and wounding dozens of others during a showing of the new "Batman" film, police said on Saturday.

Dozens of law enforcement officials are at the apartment of suspect James Holmes, who officials believe has booby-trapped his home with what appear to be sophisticated explosives.

Aurora police spokeswoman Sergeant Cassidee Carlson said officials were "confident in our evacuations at this point," adding there could be "controlled detonations" used by police to enter the third-floor apartment. She said the process would begin shortly.

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