One teacher and three children killed after Griffin J John II, 16, barged into elementary school and began shooting

• Oregon elementary school shooting: what we know so far

The 16-year-old who barged into an elementary school in Bend, Oregon, and unleashed a barrage of gunfire that killed a teacher and three children was a former student at Silver Rail elementary, officials confirmed in a Friday press conference.

The heavily armed gunman, identified as Griffin J John II, climbed over a fence and onto the school’s property before shooting through a set of locked doors to enter the building.