St. Clare Catholic School

Credit: KSDK

O'FALLON, Ill. (KSDK) — Emergency crews are responding after multiple students reported feeling sick Thursday morning after a gas leak at a St. Clair County school.

St. Clair County Emergency Management Agency Director Herb Simmons said 12 students from St. Clare Catholic School in O'Fallon, Illinois, were taken to an area hospital after reporting illness, and EMA was helping evacuated several others who may have inhaled gas.

A gas leak was located, and the gas was shut off, Simmons said. The cause of the leak was being investigated, but it was presumed to have started inside the school.

O'Fallon, Illinois, Fire Department was leading emergency response at the scene.