A rural school in far north Queensland is in lockdown after pesticide spray drifted over the grounds.
It's understood paramedics are checking students of the Butchers Creek State School, located near Malanda, for any possible side effects of the spray.
Emergency services were called to the site just after noon on Friday following reports of a "herbicide exposure".
The school is in lockdown, with students kept in their classrooms with windows and doors shut.
They're waiting for the all-clear from scientific expert crews, a Queensland Fire and Rescue spokesperson told AAP.