Police have arrested 10 people in relation to the fatal stabbing in Blenheim this morning.
They face a range of charges including murder, wounding with intent to cause grevious bodily harm, assault and disorderly behaviour.
Police rushed to the scene outside Club Envy on Market St just after 3am and found one person dead and two seriously injured.
Two people remain in hospital in a serious condition.
A homicide investigation, dubbed Operation Alaia, is underway.