A parent of a student at Irvine Elementary says the group of girls were playing near a fence adjoining the school ground during recess when they found the body of a man.
The parent, who didn't want to be named, says students were allowed to finish their school day, despite the police investigation ongoing right next to the school.
A letter released to parents says the body had likely been there since the weekend.
Coquitlam RCMP says its major crime section and forensic identification services are investigating.
RCMP have not released the name or any information about the man except that he was in his late 30s.