A 16 year old has shot dead three children and a teacher at a primary school in the US state of Oregon before he was killed by a bystander, police said.
The three children killed were aged 5, 8 and 11. A 7 year-old and a 54 year-old teacher were taken to a hospital in a critical condition.
Police said the attacker was a local 16 year old boy, but they did not release any further details on him or the identity of the victims.
