The A499 is closed in both directions after an accident.
Police urge motorists to avoid the area and detours are in place.
The incident happened at Gyrn Goch in Gwynedd and officers say the road will be closed for “a while”.
The force tweeted to say: “RTC on A499 at Gyrn Goch – emergency services on site – road will be closed for the time being – detours in place at Llanwnda and Four Crosses.”
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