Officers are on patrol following reports of off-road vehicles being used in rural areas.
OFF-ROAD motorbikes are reportedly being used at quarries in the Nantlle Valley.
North Wales Police's Caernarfon team tweeted that officers are on patrol around Rhosgadfan and Fron after being alerted to the incidents.
"After complaints about off-road motorbikes being ridden through parts of Rhosgadfan and Fron to access the local quarries, we are looking to address this," NWP Caernarfon tweeted.
"Officers are out and about locally today – please feel free to discuss your concerns when they call."
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