(AP) — A Mississippi woman says she was distressed to find dozens of plastic cafeteria trays dumped in a wooded area near a school.

Nicole Dennis tells the Hattiesburg American that she found the trash last week near NR Burger Middle School in Hattiesburg.

Hattiesburg Public School District spokeswoman Samone Wilson says school officials are “not sure how long this has been going on or who is responsible.” She says the district is taking steps to ensure it doesn’t happen again.

City crews have been cleaning up the mess.