There could be multiple investigations into how a parked tour bus managed to roll backwards down a central Auckland street - hitting a mother and her baby. The crash happened just after 1pm yesterday, on the corner of Victoria and Albert Streets.

Miraculously, no one was seriously hurt or killed - just three people sustained minor injuries.

The police are investigating was happened and Worksafe is making initial inquiries. The Transport Agency may also look into the circumstances of the crash.

Diana Glenie was waiting to cross the street and saw it all unfold - she spoke to our reporter Sarah Robson.