Two teenagers are in critical condition after another teenager, who has died, opened fire in a Colorado high school, according to authorities.

On Wednesday, Sept. 10, at 12:24 p.m., the Jefferson County Sheriff's Office received the first reports of the school shooting, at Evergreen High School, located about 30 miles southwest of Denver, where the shooter, armed with a handgun, fired shots inside and outside of the school, Jacki Kelley, spokesperson for the Jefferson County Sheriff's Office, said.

The male student who opened fire died from self-inflicted injuries, the Jefferson County Sheriff's Office stated in a post on X.

It didn't appear that officers fired any rounds, Kelley said.

Following a brief lockdown, the high school, which serves approximately 900 students, was declared safe by law enforcement.

Who was the shooter?

The identity of the shooter has not been released. Police have only stated that he was a student and died from self-inflicted injuries.

Who are the victims?

The identities of the victims have not been released, but they were also students at the high school.

The victims and the shooter were all taken to the St. Anthony Hospital in Lakewood, Colorado, according to PBS and the Denver Post.

One of the victims had critical injuries and the other had non-life-threatening injuries, Dr. Brian Blackwood, head of trauma at CommonSpirit St. Anthony Hospital, said.

What led to the shooting?

The motive for the shooting is unknown.

Kelley said the sheriff's office is still investigating the shooting. Officials are investigating the suspected shooter's motive.

It is unknown whether the shooter knew the victims of the shooting, according to the Denver Post.

Classes cancelled through the rest of the week

Evergreen High School has canceled classes and will not be in session on Thursday, September 11, and Friday, September 12, according to a press release posted by the school, according to a press release.

The school has listed different resources and support that those impacted by the shooting can receive and will release more information on resources available soon.

"While we will not hold classes for the remainder of the week, please watch for another communication with details about in-person mental health support and resources for students and families that will begin tomorrow at sites within the Evergreen community," the school stated. "Our Evergreen High School staff will also have specific opportunities to gather and receive mental health support, and we will send a separate message to staff with those details."

In a news release, the school stated in part that: "Our hearts are broken with grief by the tragedy at our school..."

Lawmakers react to the school shooting

Officials are reacting and sending their condolences to those impacted by the shooting.

Rep. Jason Crow, a Democratic representative for Colorado's 6th Congressional District, wrote in part in a post on X saying, "What a terrible day. Schools should not be shooting ranges."

"My heart is with the students, families, and entire Evergreen community after today’s tragic shooting," Colorado Governor Jared Polis stated in a post on X. "No young person should have to carry this kind of trauma, and help is available."

Polis also says he was closely monitoring the situation. State troopers were supporting local law enforcement.

Evergreen High School located near Columbine High School

Evergreen High School is located about 20 miles from Columbine High School, the site of an infamous 1999 mass shooting that killed 12 students and a teacher. Columbine's shooting is considered one of the deadliest school shootings in American history.

Shooting occurs the same day as the Charlie Kirk assassination

Hours after the high school shooting took place, another shooting at Utah Valley University in Orem, Utah, where conservative activist and Turning Point USA co-founder Charlie Kirk, 31, was holding an event.

During the event, while debating with a student, Kirk was fatally shot. Graphic videos posted online show the moment the shooting happened.

Approximately 3,000 people attended the event, prompting the school to evacuate the campus and shut down.

Police are still searching for the shooter.

This story is developing and will be updated as more information is made available.

Contributing: Melissa Galbraith, Will Carless, Thao Nguyen, Josh Meyer, Jeanine Santucci; USA TODAY

Julia is a Trending reporter for USA TODAY. Connect with her on LinkedIn, X, Instagram, and TikTok: @juliamariegz, or email her at jgomez@gannett.com

This article originally appeared on USA TODAY: Suspect dead, 2 hurt in Colorado high school shooting: Here's what we know

Reporting by Julia Gomez and Eduardo Cuevas, USA TODAY / USA TODAY

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