Auckland Transport has spoken out after yesterday's fatal stabbing of a woman on an Onehunga bus.

The man-hunt for a 37-year-old suspect ended this morning - when a man handed himself in at North Shore Police station.

Police say the attack appears random and they don't think the victim and suspect knew each other.

AT's Director of Public Transport, Stacey van der Putten, says they've increased staff numbers in Onehunga.

She says it's very concerning - and such crime is very sporadic.

"There's only so much we can do - it's a problem in terms of anti-social behaviour. The vast majority of people are really well behaved, these are tiny issues compared to what we generally see." 

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• Person dies after assault on Auckland bus; police hunt for offender
• Police arrest suspect in Auckland bus stabbing homicide after 24-hour manhunt