Just before 1800 hrs today, a call was received from a man on Western Beach who alleged that another man had brandished a handgun at him.
Officers immediately cordoned off the area to safeguard the public whilst incident was managed
The RGP and GDP Armed Response Vehicles and an ambulance were dispatched to the scene.
A UK national, 53, was then arrested on suspicion of Possession of a Firearm and on suspicion of Threats to Kill.
Officers have searched the area but no weapon of any kind has been found.
The area has now been fully reopened to the public and an investigation is underway.