UPDATE: A portion of the Southern Queensland Correction Centre remains in lockdown after five prisoners climbed onto the roof of the centre on Monday afternoon.
A Queensland Corrective Services spokesperson said investigations into the cause of the incident were ongoing.
"Any criminal activity will be referred to Queensland Police and charges will be laid where appropriate," the spokesperson said.
"Due to security reasons, no further details can be provided."
EARLIER: THE Southern Queensland Correctional Centre is in lockdown after five prisoners took to its roof on Monday afternoon.
Prisoners made a rooftop protest against a new smoking ban in Queensland's prisons but came down voluntarily early this morning.
Gatton police officer-in-charge Senior Sergeant Tom Missingham said Gatton police responded to an incident at the SQCC yesterday afternoon after five inmates climbed onto the roof of a building around 1.30pm.
"Police negotiators were called in to assist centre management," he said.
"Subsequent to that, around 1.30am this morning all five persons had retreated from the rooftop and the incident was resolved without injury to any person."
Snr Sgt Missingham said the incident was a peaceful protest about some issues at the centre.
He said police from the Corrective Service Investigation Unit were investigating the incident.
The United Voice union said the ban put prison officers' lives at risk.
"Our members already perform a gruelling job dealing with the most dangerous criminals in society," United Voice prisons co-ordinator Michael Clifford said.
SQCC operator Serco have refused to comment on the matter.
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