A worker who turned on the intercom, alerting others something was wrong.

The principal who died in the rampage at a US school was killed while lunging at the gunman, town officials said.

Police in Connecticut have said the gunman who killed 20 children at a school in America was "remote" and may have suffered from a personality disorder.

The head of the Connecticut primary school devastated by a shooting rampage was among the victims, an official said today.