Police are asking anyone with information to contact them via 105 and quote the file number 260115/7104.
Information can also be given anonymously through Crime Stoppers’ website or by calling them on 0800 555 111.
The attack comes after several violent incidents on Auckland buses recently, including an attack on a bus driver on board a Mt Eden route this week and the fatal stabbing of a passenger on a Glen Innes bus in December.
– RNZ