One person is seriously injured after a car and bus crashed in Flat Bush, East Auckland.

A police spokeswoman said they were called to the collision at 2.37pm on Jeffs Rd.

One person, believed to be the driver of the car, has sustained serious injuries and has been transported to Middlemore Hospital.

The road is currently blocked by the crash and there is a large oil spill. Contractors are on their way to manage traffic and clean up the oil spill.

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Auckland Transport urged people to avoid the area.

Diversions are in place on Jeffs Rd/Packspur Drive, Jeffs Rd/Stancombe Rd, and Jeffs Rd/ Mission Heights Drive.

The Serious Crash Unit and the Commercial Vehicle Investigation Unit are attending.