A young boy is comforted outside Sandy Hook Elementary School after a shooting in Newtown, Connecticut
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Teacher 'piled students into bathroom'

ABC journalist Mark Greenblatt describes some of the latest details emerging from the scene of the school shooting, including heroic acts by teachers.

Twenty children and six adults have been killed in a shooting attack at a primary school in the US state of Connecticut, police say.

Police Lt Paul Vance said the gunman was also dead, but gave no cause.

ABC journalist Mark Greenblatt said "heroic stories" were emerging from the school.