Yesterday after an item suspected to be a bullet was found near the main entrance police were deployed to the State Courts building.
An area the size of half a badminton court was cordoned off after the police were tip-off to an incident at Havelock Square at about 2.50pm.
Conducting the investigations were more than five police officers, both in uniform and plainclothes.
At about 4pm an officer took photos of the area with photos of a small dark-coloured object on the ground. The cordon removed shortly after the object was placed inside an envelope.
Police said investigations are ongoing.