The main Derry to Strabane road has been closed following a five car pile-up in which a number of people have been injured.
Police have sealed off the A5 Victoria Road in both directions following the collision which occurred at Mason Road junction in Magheramason around 4.00pm this afternoon.
Emergency services have attended the scene and a number of people have been taken to hospital. Their conditions are not known.
Diversions are in operation and motorists are being advised to avoid the area.
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