HARTFORD, Conn. (AP) — Officials in Newtown, Conn., say materials from the old Sandy Hook Elementary School will be pulverized and metal will be melted down in an effort to eliminate nearly every trace of the building where a gunman killed 26 people.

Contractors also will be required to sign confidentiality agreements and workers will guard the property's perimeter to prevent onlookers from taking photographs or videos.

Newtown First Selectman E. Patricia Llodra says the goal is to prevent exploitation of any remnants of the building.

Demolition is set to begin next week and be finished before the Dec. 14 anniversary of the shootings. Town voters last month accepted a state grant of $49.3 million to raze the building and build a new school.

The confidentiality agreements were first reported by The News-Times of Danbury.