Dunedin was plunged into darkness tonight after the city's streetlights did not turn on.
Delta marketing and communications manager Gary Johnson said the lights were scheduled to turn on at 8.52pm, but the automatic activation never occurred.
Reports of the issue from around the city started circulating social media about 9.30pm.
The lights were switched on manually from 9.50pm and all lights were confirmed on by 10.10pm, Mr Johnson said.
"We apologise for any inconvenience and will be carrying out further investigation to pinpoint the reason the switching did not operate automatically as scheduled," he said.
