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CENTENNIAL, Colo. (AP) -- Colorado authorities say a suburban Denver high school student who may have had a grudge against a teacher came gunning for him today. The targeted teacher fled and the student shot another who confronted him, wounded a second student and then apparently took his own life. The mayhem took place at Arapahoe High, in Centennial. That's just eight miles from the scene of the 1999 mass shooting at Columbine High, in Littleton.

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