The drama on January 29 began about 3.40pm after a man was believed to have left a property in Tikipunga with a pistol.
Officers were sent to nearby streets and places it was thought he may go. About 30 minutes later, officers put cordons in place in Charles St and stopped traffic from going in and out.
Neighbours in the area were out on the lawns or the decks of their homes watching the action unfold.
The Armed Offenders Squad arrived at the scene at 5.45pm with a police dog and handler there soon after, accessing the scene through Eden Terrace, a street overlooking Charles St.
However, the man could not be found at the time.