At least two people were injured when a gunman opened fire at a high school in suburban Denver, Colo., Friday, before killing himself, reports indicate.
Information is still coming in, but authorities say that the suspect was a male student at the school, Arapahoe High School, which is located in Centennial.
He had reportedly sought to confront a teacher, officials believe.
The Arapahoe County Sheriff addressed the case moments ago.
One of the victims, who is believed to be a student at the school, remains in critical condition, according to reports from Colorado emergency officials.
Hospital officials said the injured student was in critical condition.
Another student suffered a minor wound, said Arapahoe County Sheriff Grayson Robinson, adding authorities were not sure it was a gunshot wound.
Police did not release the name of the deceased, alleged shooter.
Robinson said, "At 12:33 this afternoon, an individual came to the Arapahoe High School on the West Side, entered the school armed with a shotgun."
"Was looking for an individual teacher that he identified by name. The teacher began to understand that he was being looked at, exited the school.
"One student confronted the armed student, and was shot."
"We located what we believed to be the suspect and the active shooter. That individual is currently deceased and he apparently killed himself."
Video showed students leaving the building in orderly fashion, with their hands raised. They were then frisked by security officers before moving on.
The school is eight miles from Columbine H.S. in Littleton, where two teenagers infamously killed 12 classmates, a teacher and themselves in 1999.
The Colorado school shooting comes almost one year since the tragedy in Newtown, Conn., where 20 first-graders and six educators were killed.
The Connecticut shooting took place December 14 of last year.