Gunman kills 9 in a mass shooting at a school in Austria

Police officers are seen in a street near a school where a gunman opened fire Tuesday morning in Graz, Austria.

"There are no words to describe the pain, the disbelief and the grief that all of Austria feels right now," said the country's Chancellor Christian Stocker. "Our country has fallen silent in horror."

(Image credit: ERWIN SCHERIAU)