The Pennsylvania Attorney General's Office wants to find out how 22 tons of demolition waste got to Essroc Cement Corp. in Nazareth.

The waste, which authorities say might include pollutants such as asbestos, came from a school that caught fire in Newark, according to a police report. An Essroc representative found it Dec. 17 and told borough police.

No charges have been filed but Northampton County District Attorney John Morganelli said the waste was left by a Newark trucking company hired to help in the school cleanup. He said Essroc is not under investigation.

"We believe Essroc is a victim," he said.

Morganelli referred the investigation to the attorney general's environmental crimes unit. A spokesman for the attorney general said the office plans to start an investigation soon.

An Essroc spokesman said the the cement maker is cooperating with authorities and is not under investigation.