A teen shooter who wounded two fellow students when he opened fire at a Colorado high school Wednesday was only 16 years old — and “radicalized by an extremist network,” authorities said.

Desmond Holly was identified as the disturbed teen gunman who caused havoc at Evergreen High School, about 30 miles west of Denver, before he turned the gun on himself and later died at the hospital, police said Thursday.

Holly used a revolver to start shooting outside the high school, though some of the shots appeared to reach inside the building, the local sheriff’s office said.

Desmond Holly, 16, was identified as the disturbed teen gunman who caused havoc at Evergreen High School before he turned the gun on himself and later died at the hospital. Jefferson County Sheriff’s Office

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