Selwyn Ridge School was in lock down this afternoon after armed police cordoned off areas of Welcome Bay.
It is believed police told the school to go into lock down about 2.30pm, which is when students are usually released for the day.
The school was gathered in the hall but the children have just been allowed to leave the hall, according to the school's after school service, YMCA.
An eyewitness to the police operation in Welcome Bay saw armed police enter a house, put several men on the ground and point a gun at them.
The drama unfolded just after midday today at a Greerton address, suspected to be connected to a P lab.