Emergency services are currently at the scene of a crash in Rolleston, Canterbury.
The incident happened on State Highway 1 just south of Templeton.
A police spokeswoman said those involved in the crash suffered minor to moderate injuries.
She could not confirm how many vehicles were involved and the number of people caught up in the accident; but said no one had been taken to hospital for treatment.
"We're working to clear the road now,'' she said.
Motorists are being warned to avoid the area or expect delays as authorities tend to the scene.