(NBC News) A gunman is dead and two students wounded following a shooting inside Colorado's Arapahoe High School.
Authorities say a student entered the Centennial school armed with a gun and asked for a specific teacher by name.
Another student confronted the gunman, was shot and seriously wounded.
The campus was quickly placed on lock-down.
Police say the gunman was found dead of a self-inflicted gunshot wound.
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