Police say speed appears to be a factor in the Pakuranga Rd crash that killed a male and a female.
Some Pakuranga residents reported hearing a "loud bang" about 4.30am before two people were found dead in a crashed car in Pakuranga early this morning.
Senior Sergeant Jono Chappell said investigations have found that the crash took place about 4.30am.
"Early indications suggest that speed appears to be a factor in this crash, however this will form part of the investigation by our Serious Crash Unit."
Police want to hear from anyone who saw a dark-coloured Honda Accord near Pakuranga Road around 4.30am.