The bodies of the victims, who are in their early 50s, were found in a bush allotment at Lakepa with stab wounds to their heads and necks on Sunday afternoon.
The couple’s vehicle, a silver Toyota Sparky 2000, registration number L16768 is missing.
Police are looking for the vehicle as of interest to their homicide investigation.
Police are also appealing for anyone who has any information about the homicide to come forward or contact Police Emergency 922, 23417 or the nearest Police station to you.