Queensland Rail is stopping commuters from using bins at train stations, as it responds to the nation's elevated terror threat alert.

Signs have appeared on bins advising commuters that for "safety reasons" it is no longer available.

Commuters are no longer allowed to used bins at Brisbane train stations because of security concerns. Credit:Catherine Lewis

"Please take your rubbish with you. We apologise for any inconvenience", the signs read.

Security has also been increased at Parliament House and other government buildings, in line with the change in threat level from moderate to high.