A 15-year-old Russian schoolboy attacked his teacher with an axe, before opening fire with an air gun and throwing homemade smoke grenades, at a school in Ivanteyevka, the Moscow Region, Tuesday. «On 11th September I'll come with a pistol and an explosive device,» the teenager allegedly said online in a warning to his classmates. The teacher was hospitalized in a serious condition; three... Еще children were also injured in the attack. The school has been cordoned off and closed for the day. The Russian authorities are investigating the incident.