BRISBANE City Council has installed concrete security bollards at the Albert St entry to Queen St Mall in the heart of the CBD. 

Brisbane City Council declined to comment on the security measures, which mirror those taken in Sydney and Melbourne. 

"Brisbane City Council does not discuss security arrangements," a spokesperson said.

"Obviously we do a lot of work around security, but the reality is it's probably not appropriate for me to talk about those measures," Lord Mayor Graham Quirk said recently.

"But I just want to assure people … we are doing a lot of work with the Queensland Police Service around security measures.

"We continue to look for opportunities where we can to continue to make this place a very safe city, and it is a safe city.

"We are forever vigilant and will continue to work with Queensland Police to ensure we do what we need to do."

Meanwhile, a Queensland Police Service spokesman said Brisbane residents could rest assured that police regularly worked with the council to provide advice on security measures.

"For operational reasons, the QPS does not comment on the specific security advice it provides publicly," the spokesman said. "While the national terrorism threat level is at 'probable', there is no known specific threat to Brisbane."♦