Materials at first suspected of being undetonated explosive material buried on the grounds of Prospect Hill School were found not to be dangerous, said Pelham Superintendent Dr. Cheryl Champ in an email.

Prospect Hill was evacuated and the Westchester County Police Bomb Squad was contacted to dispose of the material

The bomb squad “has determined that the material unearthed at Prospect Hill this afternoon is not explosive and the area has been given the all clear,” Champ wrote in an email update.

The material was uncovered as part of the construction work at the elementary school.

Uniformed officers and other officials were seen walking around the construction site.

“I am extremely thankful for the quick response of the Pelham Manor police and fire departments and for the assistance of the bomb squad,” said Champ in an email.