Boy, 12, kills maths teacher in school with semi-automatic handgun

A boy opened fire with a semi-automatic handgun at his Nevada school yesterday, killing a maths teacher who was trying to protect pupils and wounding two 12-year-old classmates, before turning the weapon on himself.

The boy killed himself after a rampage witnessed by 20 to 30 terrified children who had just returned to school from a week-long autumn break, police said.