Police are attending both scenes
Accidents have caused diversions on both the A5 near Capel Curig and the A4086 towards Llanrug.
North Wales Police and Welsh Ambulance are currently at the scene of the road traffic collision (RTC) on the A5 approximately 1.5 miles from Capel Curig towards Bethesda.
Lanes in both directions of the A5 are now closed and motorists are encouraged to take alternative routes.
The RTC on the A4086 has occurred on the bridge at Pont-rug in Caernarfon towards Llanrug.
The road is blocked and emergency services are at the scene and have put diversions in place.
Police are urging drivers to avoid the area.
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