MONACA, Pa. (KDKA/AP) – The head of security for a Pennsylvania community college says police found “nothing” after searching an area near a pile of construction debris where cadaver dogs reacted to something over the weekend.

Butler County Community College’s head of security, Scott Richardson, says an unspecified group had the dogs on a remote part of the campus about 30 miles north of Pittsburgh for a training exercise on Saturday. The group was training the dogs for search-and-rescue missions.

The dogs’ behavior prompted the school to contact state police, who used their own cadaver dog to search the area again Tuesday.

“Those dogs, I believe, left their area [where] they were training. They were drawn to a scent, the handlers then followed the dogs to the scent, and decided it best to call Butler County Emergency Services,” said Bill Foley, of Butler County Community College.

Richardson says troopers from the Butler barracks found nothing and have completed their investigation.

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(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)

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