A line of seven separate orange lights in the sky has several Bay of Plenty people puzzled tonight.

Stewart Kennedy of Mt Maunganui says he and half a dozen other people watched the mystery lights move noiselessly and slowly in from the southeast and travel out over the sea, where they eventually disappeared from sight.

He says they were low in the sky.

Stewart Kennedy says no way were they aircraft or weather balloons.

He says the lights did not pulsate, but gave out a steady glow.

Police say they've had no reports.