Colorado school shooting: Gunman dead, two students injured
13 December 2013 Last updated at 22:36 GMT
A student who is believed to have brought a shotgun into a school in Arapahoe County, Colorado has been found dead of an apparent self-inflicted gunshot wound, US sheriffs have said.
Two students have been injured - one when they confronted the gunman.
Jonny Dymond reports.