Gainesville, GA – Derreck Booth, – Students at McEver Elementary are back in class after being bused to Free Chapel Worship Center following a carbon monoxide alarm Thursday morning.

It happened in one wing of the building before students arrived. On advice of the fire department, teachers and students were taken to the church.

Firefighters believe the culprit is a heating and air unit in one wing. They’ve been shut down pending follow-up tests Thursday tonight.