Sheriff: At Least Two People Injured in Colorado High School Shooting (UPDATE: Suspect Dead of Self-Inflicted Gunshot Wound)

A student armed with a shotgun entered a Colorado high school campus Friday afternoon and shot at least one other student before turning the gun on himself, authorities said.

"The shooter is dead as a result of a self inflicted gunshot wound," Sheriff Grayson Robinson announced at a press conference.

Robinson added that the student shot is in critical condition and another suffered non-critical unknown injuries at Arapahoe High School.

The suspect was believed to have been looking for one particular teacher who managed to escape before being located.

"That teacher was informed of the situation and exited quickly," Robinson said.

Police respond to a high school shooting in Colorado Friday. (Image source: @9News)

One student recounted the incident to ABC news.

"I heard one shot fired," the unidentified student said. "Then two more went off and I knew it was a gunshot after that and it echoed in the hallways."

[sharequote align="center"]"...I knew it was a gunshot after that and it echoed in the hallways."[/sharequote]

Another student told KDVR that his teacher tried to calm the class down.

"Out teacher was trying to calm us down. A couple people were crying. In the moment we couldn't even think at all," the unidentified student said.

Individuals comfort each other after a high school shooting in Colorado Friday. (Image source: @RyanParkerDP)

Schools in the area are on lockdown and authorities are on the scene.

The school is about 8 miles east of Columbine High School in Littleton, where two teenage shooters killed 12 classmates and a teacher before killing themselves in 1999.

The shooting also comes just one day before the 1-year-anniversary of the Sandy Hook shooting that claimed 26 lives, but authorities do not believe the two events to be related.

The Associated Press contributed to this report. This is a developing news story. Updates will be added.

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