An investigation is underway following a light aircraft crash on the A40 between Abergavenny and Raglan.
Emergency services were called to the scene at 11:03am on Sunday 12 May.
Three people, who were onboard the plane, were assisted to safety by those driving nearby before emergency services arrived.
The passengers were treated for minor injuries by paramedics and transported by ambulance. Their injuries are not life-threatening.
No other casualties have been reported.
Gwent Police said the plane made an "unscheduled landing in the area" and collided with overhead wiring. South Wales Fire and Rescue confirmed power lines were been damaged in the crash.
The A40 was closed in both directions due to "extensive debris" on the route. The road was reopened at around 4:30pm on Sunday.
South Wales Fire and Rescue said overhead power lines had been damaged in the crash.
Gwent police advised motorists to avoid the area and find alternative routes.
Those driving along the road helped the three passengers of the plane to safety.
Roads around the area were closed for some time on Sunday.
Buses and trains were also affected as emergency services dealt with the incident.
Buses were delayed and many trains in the area stopped while emergency services dealt with the crash.
South Wales Fire and Rescue confirmed crews from Abergavenny, Blaenavon & Malpas were all in attendendance.