Officials with the Peace River South School District confirm the incident happened at École Frank Ross, but are saying little else, refusing to confirm how many students ate the cookies in question, or whether any of them became ill as a result.
"For privacy reasons, the school district can only make limited comment, but can confirm such an incident did occur and that the appropriate authorities were involved and addressed the issue," said superintendent Leslie Lamm in an e-mailed statement.
The CBC has learned the students in question are eight or nine years old, and that the number of those who ate the cookies is small.
School district officials will only say the cookies are suspected to have been "drug-laced" but they refuse to say why they believe that to be the case.
The Ministry of Children and Family Development is involved, and RCMP confirm an investigation is underway.