Police are calling for witnesses to an "altercation" that ended with three men airlifted to hospital over the weekend.
Wairoa Police Senior Sergeant Maui Aben said police in Wairoa are investigating the Saturday night incident.
Police were called to a Wairoa residential property just before midnight after reports of an "altercation" between a group of people.
Three people were airlifted to Hawke's Bay Hospital.
A Hawke's Bay DHB spokesperson said the three men were transferred from Wairoa Hospital to Hawke's Bay Hospital.