"It looked pretty peculiar . . . others saw it too."
Westport man John Bethell said he also saw strange lights in the sky, but that was on Saturday.
The lights were coming from the Buller Bridge area and were very high in the sky.
The lights then went out, and silhouetted against the clouds looked like a group of drones in formation.
"It was really weird."
Garden City Helicopters said yesterday it thought the lights above Greymouth could be explained as coming from the NZCC Rescue Helicopter, which was returning from a three-and-a-half-hour round trip from Greymouth-Westport-Christchurch-Greymouth about that time.