Police have said it is too early to know if a student gunman was targeting anyone when he opened fire at a school in Nevada, wounding two boys and killing a teacher.
The shootings occurred at 7:16am local time, around 15 minutes before classes were scheduled to begin at Sparks Middle School, with the school already busy with pupils.
Pupil Kyle Nucum, who witnessed the shooting, told a local newspaper that he heard “a pop, like a loud pop, and everybody was screaming. The teacher fell and everybody ran away."
More top news
The widow of a man killed in the Tunisia terror attack has described how she "played dead" after they were both shot by the beach gunman.
A young doctor, who reached his fundraising target of £100,000 last week, has died of a cancer that runs in his family.
Three men have been arrested in Sweden on suspicion of taking part in a rape that was streamed live on Facebook.