Passengers were pulled out of the burning remains of a small plane that crashed onto a dual carriageway.
Shortly after 11am this morning the light aircraft ploughed into the A40 between Abergaenney and Raglan, hitting overhead power cables as it descended.
As traffic skidded to a halt a plume of smoke billowed into the air, followed by at least two small explosions.
Witnesses reported one brave man rushing to the wreckage and pulled the passengers to safety.
Miraculously the three passengers escaped with non life-threatening injuries.
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Jo Pocock was travelling along the carriageway when the cars started to slow down.
"We just saw all the cars coming to a quick stand still then the smoke and then a couple of mini explosions," she said.
Dan Tightley said: "This must of been the plane I heard going over earlier.
"The engine didn’t sound too good. Sounded like it was cutting out, glad everyone’s ok."
Kelly Hale said her partner was on the scene and that the plane was still on fire.
She added on Facebook: "He said he's stood next to the person who pulled them all out.
"They're safe and the guy is a hero."
Three fire engines rushed to the scene, according to witnesses on the road.
By midday the cars were being turned around and smoke had stopped billowing into the sky.
The Fire Service requested all trains were stopped in the area due to the plane hitting the overhead power cables.
A spokeswoman for the Welsh Ambulance Service said two people have been taken to hospital with “minor injuries”.
They were taken to Nevill Hall Hospital in Abergavenny by ambulance.
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According to local reports there is a private runway next to the road.
On June 10 last year two people died in a light aircraft accident a short distance from today's crash.
Martin Bishop, 61, and 68-year-old Roderick Weaver, of Cardiff, were found dead on the outskirts of Raglan.
On June 25, 2016 another light aircraft crashed on the A40, with the three people on board escaping with minor injuries.
Stagecoach Wales announced it has cancelled some of its services following the crash.
The travel company Tweeted: "Due to a Police incident and road closures on the A40 at Raglan, we regret we were unable to operate Service 83 from Raglan to Abergavenny at 11:30am.
"This has also effected the 1157 Service 45 Llwynu Estate. Apologies for any inconvenience caused. Updates to follow."
