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CENTENNIAL - Colorado authorities say a gunman is dead of a self-inflicted gunshot wound after apparently shooting and wounding at least two people during an incident at Arapahoe High School in Centennial, near Littleton, Colorado Friday afternoon.

Police are calling it an "active shooter situation."

The identity of the victims and the alleged shooter is not being released at this time.

Arapahoe High School is a part of Littleton Public Schools. There are 70 different classrooms in the high school which covers a 254,000-square-foot area. There are 2,229 students that attend the high school.

Students were evacuated using an "active shooter" protocol. While police were securing the building they came upon a student who had suffered a minor injury. The other student was transported to a local hospital with a gunshot wound that is defined as serious.

Officers then came upon the alleged shooter, who they found dead of what appears to be a self-inflicted gunshot wound.

Sheriff Grayson Robinson says the gunman may have been trying to target a teacher.

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.

All the other schools in the Littleton district have also been locked down.

A student from Arapahoe High School describes hearing gunshots and screaming during the shooting at the school outside Denver, Colorado. KUSA

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