Email threats sent to schools in the north-east have been deemed not credible by police.
A major safety alert was sparked this morning after more than 100 schools in the region received emails warning of an attack later today.
Durham Police and neighbouring forces are currently working together to establish the facts and investigate who is responsible.
Durham Police chief inspector, Catherine Clarke, said: “We can confirm that at this time we believe none of the threats received by schools to date are considered to be credible.
“In the absence of any further threats being received, schools do not need to take any further action.
“If any further threats are received they should be reported immediately to police.
“We are in contact with the schools in our area to give guidance and reassurance.
“Anyone with any information that could assist police should contact Durham Constabulary on 101, or Crimestoppers anonymously on 0800 555 111.”