A double-decker bus has collided with two vehicles at the start of the Fanshawe St motorway onramp in Auckland.

A police spokeswoman said no one was seriously hurt in the crash, which happened just before 4.20pm underneath the Victoria Park flyover. All bus passengers were transferred to another bus, which has left the scene.

The crash is blocking one lane for commuters headed north toward the Auckland Harbour Bridge.

The New Zealand Transport Agency said drivers should expect delays and pass with care.