PETALUMA (CBS/AP) — A gruesome prank has left many Northern California high school students feeling disturbed and upset.

Mark Scott of Petaluma Animal Control says when Petaluma High School students arrived for classes Friday, they saw a dead baby goat strung up at the top of a fence surrounding a ball field.

READ MORE: UPDATE: Victim, Suspect Identified In Fatal Oakland Park Shooting in Front of Children

Scott says his agency is investigating but that no one knows how the 15-pound baby goat died or what purpose — if any — the prank served.

READ MORE: COVID: Youth, Adult Multi-Team Sports Can Resume In Alameda Co., Berkeley

Bay Area station KTVU reports that school officials wouldn’t comment on the incident but that some students speculate it could have been a senior class prank or the work of a rival school.

MORE NEWS: UPDATE: Missing San Francisco Girl Found Safe In Pittsburg With Michigan Runaway

© Copyright 2014 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed