Up to seven people are believed to have been injured - one of them seriously - in a crash involving up to five cars in Argyll.
Police said the incident happened on the A83 near the Rest and Be Thankful at about 1505 BST on Friday.
Officers and ambulance crews were in attendance and the road was closed in both directions.
The road connects the A82 at Loch Lomond to the Kintyre peninsula. Diversions were put in place.