Police are releasing details of a dangerous man sought in connection with the homicide in east Auckland last night.
He is 36-year-old Adrian Pani, and Police advise the public to not approach him.
A homicide investigation has been underway since Monday night, 8 December.
Detective Inspector Glenn Baldwin, of Auckland City CIB, says two men were senselessly attacked, aboard the number 76 bus travelling from Glen Innes towards Ōrakei.
A 59-year-old man from east Auckland died in hospital last night after suffering a fatal knife wound.
"The second victim has undergone surgery on his hand today and remains in a serious but stable condition in Auckland City Hospital," he says.
"Our investigators worked through the night to identify the offender, and I want to acknowledge their work in advancing this investigation."
A search warrant, assisted by the Armed Offenders Squad, was carried this morning but the offender was not located and remains outstanding.
Late this morning, Police obtained a warrant to arrest 36-year-old Adrian Pani.
Pani is wanted to arrest for murder and causing grievous bodily harm.
"Pani should be considered armed and dangerous, and I stress to anyone not to approach him," Detective Inspector Baldwin says.