Newcastle East Public School is the subject of another asbestos scare following the discovery of suspected asbestos this week.
A contractor installing data cables under the sub-floor of the school's heritage building discovered the material.
While the area is not accessible to students and staff, it is unclear how long the material has been present for.
A notification sent to parents on Thursday said the area had been isolated and students had been relocated while testing occurred.
The Newcastle Herald has requested the Department of Education provide further information about the discovery.
The latest incident follows the discovery of friable asbestos fibers in the heritage building earlier this year.
The fibers are believed to have broken off a piece of Super Six sheeting that was discovered in the building's roof cavity during works to replace the slate roof.
