An Air Force helicopter has been brought in to retrieve a car which crashed into a Hawke's Bay river killing three gang members.
The car carrying four Wairoa Mongrel Mob members plunged 150 metres into Mohaka River on Saturday afternoon.
The men had been on their way to the mob's 50th anniversary celebrations.
Three men died and one was treated at Wairoa Hospital for minor injuries.
A crane was unable to reach the car on Sunday.
An Air Force chopper, which has better manoeuvrability, will attempt to retrieve the car on this morning, police say.
State Highway 2 around Mohaka is closed from 10am-midday, with diversions in place.
Police are investigating why the car ran off the road.
"We have found evidence at the scene that suggests a blue car may have been involved, but at this stage we have no more information about it," Detective Senior Sergeant Brent Greville said.
Officers want to hear from anyone who saw a blue car with a dent on its bonnet in the area.
Police have not yet named the deceased, who are all from Wairoa, and are liaising with their families.