A school bus crashed into trees after it left the road near Corby.
The crash, which also involved a lorry, happened at about 7.40am close to the Eurohub roundabout at the A43 junction with the A6116.
Emergency services were called to the scene but all the bus passengers were able to walk off the bus.
There were no serious injuries.
Police said the incident was closed at 10.44am.