Mini bus crash in Sydney's north

A mini-bus carrying children has crashed in Sydney's north.

The bus was travelling on the Warringah Freeway at North Sydney when it collided with two cars.

15 people were treated at the scene, most of them are believed to be young children.

The exact circumstances of the crash aren't known at this stage.

Six of the children are being treated at Royal North Shore Hospital for minor injuries including "bumps and bruises" and are all in a stable condition.