Police say 15 students are involved in a school bus crash on Auckland's North Shore.

None are seriously injured, but the driver of the bus and the driver of another car involved have been taken to hospital as a precaution.

The Dairy Flat Highway's blocked and diversions are in place.

The bus appears to have gone off the road and tipped on an angle in a bush.

A photo sent to NZME shows a number of young people, mostly teenagers, standing next to the Ritchies bus.

Emergency services are responding.

On the other side of the city, St John is responding to a crash between two buses in South Auckland.

It's on Rimu Road in Mangere Bridge.

It's not known whether there are any injuries yet.