Emergency services in East Lothian are currently on the scene of a vehicle fire following a three-car collision.
Police and firefighters raced to the A199, just outside Dunbar, after receiving reports of the accident, accompanied by four appliances mobilised by Scottish Fire and Rescue.
Eyewitnesses reported seeing large clouds of black smoke in the air ahead of them, with dozens of vehicles turning on the road as there was no way past the incident.
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One East Lothian bus service, the X7, has been diverted due to the incident, with Lothian Buses posting an update on social media.
Another user on Twitter said: "A199 between East Linton and Dunbar closed due to an accident. Buses diverted and delayed."
The accident appears to have occurred near Foxlake Adventures, with cars turning on the road and coming back towards Dunbar.
The A199 was formerly the main A1 but now runs between Dunbar, East Linton and all the way to the outskirts of Edinburgh.
A spokesperson for the Scottish Fire and Rescue Service said: "We are currently dealing with a vehicle alight on the A199.
"We received the call at 16:17 and mobilised an initial two appliances, with a further two shortly after. Two have now left the scene."
A Police Scotland spokesperson said : "Officers are currently in attendance following a crash on the A199 near to Foxlake Adventures involving three vehicles, which happened at around 4.20pm today (Thursday, 9 June, 2022). Road closures are in place."