EVERGREEN, Colo. — The actions of teachers and students inside Evergreen High School “saved lives” as a chaotic shooting scene unfolded there Wednesday, the Jefferson County Sheriff’s Office said during a news briefing in which officials provided more insight into what happened a day after the shooting occurred.

Two students remain in critical condition as of Thursday afternoon. The shooter, a 16-year-old student who may have been “radicalized by some extremist network,” died hours after turning the gun on himself.

A motive for the shooting remained unclear 24 hours into the tragedy, which a sheriff’s office spokeswoman said could have been a lot worse without the quick thinking of people at the school.

“Lots and lots of kids and teachers locked down in those rooms did what they were

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