A Daily Mercury reporter at the scene said police appeared to be focusing their attention on the northern end of the campus.
She said while police could not reveal what exactly they were looking for, more police vehicles had started to arrive on scene.
More to come.
UPDATE 11.30AM: FITZGERALD State School is in lockdown.
A Daily Mercury reporter at the scene said multiple police vehicles, including a forensic crew, were at the school.
She said police at the scene have verified the situation is not a drill.
It is understood parents have yet to be notified.
BREAKING 10.30AM: POLICE are investigating after reports of a 'suspicious device' in North Mackay.
A Queensland Police spokeswoman confirmed the device was reported at a location on Norris Road.
Reports suggest parts of the area are in lock down.
It is unknown if schools in the area have been impacted.
No further information could be provided.