UPDATE: QGC staff self-evacuated to escape smoke at CBD
FIRE fighters are at a loss as to what caused Goondoon Street's QGC building to fill with smoke just after 8pm.
Gladstone fire station officer Chris Sullivan said QGC employees inside the build "self-evacuated" before alerting emergency crews.
"We could actually see that there was some smoke in their office area," he said.
"We have gone through and ventilated that smoke. We still can't find the cause for that smoke."
Mr Sullivan said the ventilator fire fighters used to get rid of the smoke had filled the building with carbon monoxide, which they expect will clear shortly.
"We are still waiting for the carbon monoxide level to decrease to a safe level, so we can hand the office back to the tenancies, and at that point Ergon energy will isolate so that they can further address it in the morning."
THREE Ergon employees are on stand-by, in case fire crews need a part of the building "isolated" by turning the electricity off.
It's still not clear what has caused the smoke.
Police have cordoned off a large part of Goondoon St which extends from Roseberry St to the entertainment centre.
Fire crews are walking in and out of the QGC building.
More to come.
A POLICE officer on the scene has described the smoke coming from the scene as "like a motor burning out".
"But it's getting worse," she said.
Police have now moved bystanders further back from the QGC building as fire fighters evaluate the building.
Three fire units, paramedics, and a handful of police are on the scene.
Police have cordoned off a large part of Goondoon St.
SMOKE has been seen rising from the QGC building on Goondoon St.
Around 10 police were at the scene keeping bystanders clear of the building.
One unit of a fire crews has been evaluating the bottom floor of the building, and another fire unit has just arrived.
A police officer on the scene said smoke was in the buildings vents, but he didn't have anymore details than that.
More to come.