Police cordoned off a large stretch of London Circuit and used an aerial drone to investigate a potential threat outside Civic police station on Friday.
A report was made that a person had been seen scaling the police station about 11am. Police were told that the man placed an item on the first floor ledge.
London Circuit was closed between West Row and Farrell Place for a short time around lunch on Friday.
Pedestrian access was cordoned off in the square between the office of the Director of Public Prosecutions, the City Police Station, and the ACT Supreme Court.
Police took to social media to alert the public to an “operation” that was taking place.
ACT Policing is currently conducting a police operation on London Circuit. London Circuit is closed between West Row and Farrell Place.