EVERGREEN, Colo. — A student at Evergreen High School fired "multiple" rounds inside the school before crossing the football field and continuing his attack on Sept. 10, the Jefferson County Sheriff's Office said in an update Tuesday.

While the investigation is ongoing, the sheriff's office said it "[wanted] to provide a little more clarity on what happened."

The first deputy was dispatched to the school at 12:24 p.m. on Sept. 10 "shortly after calls began to flood 911." Deputies arrived within 2.5 minutes.

According to JCSO, the 16-year-old shooter fired multiple rounds inside the school, injuring one student. He then left the building, crossed the football field, and shot a second student at the corner of S. Olive Road and Buffalo Park Road, JCSO said.

Deputies confronted the shooter

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