Two men are being held for firearms offences after armed police were called out to an estate in Caernarfon.
Three people were arrested on Tuesday night following a disturbance at Bro Seiont the previous evening.
Officers were called out after reports of suspicious behaviour in the area at around 5pm on Bank Holiday Monday (26th August). Both men arrested are still in police custody.
A woman arrested for obstructing police officers has been released on bail and is due to appear in court.
No further details about the incident are available.