Two students are in critical condition following a shooting at a high school in Colorado. The attacker, a classmate, has committed suicide.

The attack took place on Wednesday, around 12:30 PM, at Evergreen High School in the suburbs of Denver. All victims transported to the hospital are presumed to be students, according to the spokesperson for the Jefferson County Sheriff's Office, Jacki Kelley. Following the attack, two teenagers were hospitalized, and the attacker died from self-inflicted injuries. The causes of the attack are still unclear.