A massive search was due to resume this morning for two fishermen whose boat capsized near Fiordland.
The search and rescue fleet, including three boats and two helicopters equipped with night-vision goggles and thermal imaging equipment, failed to find any sign of the two missing men last night.
The alarm was raised at 5pm when a fishing vessel came across a fuel slick near the mouth of Milford Sound.
Ninety minutes later, an inflated life raft was located drifting 12km southwest of the oil slick.
A life ring and some other items have also been located.