The Ogun government has dismissed traditional explanations surrounding recurring gas emissions in Ijebu-Ode communities.
It described the incidents as natural underground geological events linked to fault lines.
The Commissioner for Environment, Dr Ola Oresanya, spoke during a town hall meeting in Ijebu-Ode on Sunday.
The News Agency of Nigeria (NAN) reports that students and teachers were hospitalised after suspected chemical odour exposure.
The incidents occurred on three occasions this year across some schools in Ijebu-Ode.
