PORTHMADOG bypass is closed this morning following a serious collision at around 9am.
The A487 between Porthmadog and Penrhyndeudraeth is currently still closed and motorists are being advised to avoid the area.
The collision between a heavy goods vehicle and a van occurred shortly before 9am this morning.
One person has been flown by air ambulance to Stoke with serious injuries.
A spokesperson for North Wales Police said: “The bypass between Porthmadog and Penrhyndeudraeth is closed for vehicle recovery following a collision between a HGV and a van just before 9am.
“Motorists are asked to take alternative routes.”