At least two people are dead following an "avoidable" crash near Blenheim, raising the holiday road toll to 15 - already three more than last year's total for the entire holiday period.
Two vehicles were travelling down Old Renwick Road heading towards Renwick when one of the vehicles lost control, crossed the centre line and collided with a power pole, police said.
The car then burst into flames. Speed had been a major factor in the "avoidable" crash.
"At this stage we can confirm at least two deceased; however, further investigations are required to ensure no further persons in the vehicle."
Forensic confirmation of identification would be required.