Two students were injured this afternoon during a shooting at Arapahoe High School in Centennial, Colorado. The gunman, who was a student at the school, is dead, reportedly from a self-inflicted gunshot.

Our original post is below:

According to multiple reports, at least two people were injured during a shooting this morning at Arapahoe High School in Centennial, Colorado. There are unconfirmed reports of an active shooter, a critically injured student, and a fire at the school.

There are unconfirmed reports of an active shooter, a critically injured student, and a fire at the school.

Police have reportedly surrounded Araphoe and all schools in the area have been put on lockdown. We'll update as more information becomes available.

UPDATE 3:55 PM: Arapahoe Sheriff Grayson Robinson just announced that one student was critically injured, reportedly as he confronted the gunman, and another suffered minor injuries. Both were taken to a nearby hospital.

Robinson confirmed that the shooter was found dead inside the school, apparently from a self-inflicted gunshot wound. The shooter's identity has not yet been released, but Robinson said he was a student at the school.

The shooter was reportedly roaming the school with a shotgun, searching for a particular teacher—who was notified and left the school—when another student confronted him.

UPDATE 3:47 PM: Authorities have reportedly confirmed that a 15 or 16 year-old student was shot.

And one student is in critical condition, according to a hospital spokesman.

[Image via Heather Burke]