A man is being questioned on suspicion of affray following a disturbance on a Caernarfon estate.
Detectives are appealing for witnesses following a public order incident in the Maes Hyfryd area at around 2.30pm on Tuesday afternoon.
The suspect, who remains in police custody, was also arrested on suspicion of possession a bladed article.
PC Fflur Hughes from North Wales Police said: "I would like to speak with anyone walking or driving, who may have witnessed the incident to come forward."
Anyone with information should contact North Wales Police on 101 or visit the live web chat, quoting reference no. 24000880779.
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