According to CNN.com:
Authorities believe at least two people have been injured in a shooting Friday at Arapahoe High School in Centennial, Colorado, Sheriff Grayson Robinson told CNN affiliate KMGH.
The shooter is still believed to be inside the school, Robinson said.
Dozens of children could be seen walking away from the school, with their hands in the air. Some stood in lines at what appeared the high school track field, where they appeared to be undergoing police pat-downs.
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