A major power outage in Auckland is now being restored after more than 2000 residents were without power in the inner-city suburbs.

Vector has reported that the unplanned power outage has mostly been restored in the Freemans Bay and Ponsonby areas, including Aotea Square, with a few houses still affected around Franklin Rd.

It said about 2300 customers were affected and many traffic lights were taken out by the outage.

A Vector spokesman said the interruption was caused by a power line coming down in the area.

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He said a crew was on the way to fix it but had been held up due to a crash on the motorway.

"They are imminently going to arrive and once they have we will know how soon power will be restored."

An earlier estimated time of power restoration to the area was expected to be approximately 6.40pm.

Vector advised people to check their website or download the Vector Outage app for further information.

A major power outage affected residents and businesses in the Auckland CBD this afternoon.
A major power outage affected residents and businesses in the Auckland CBD this afternoon.

Auckland Transport and the NZ Transport Agency warned motorists earlier to expect delays in the city due to multiple traffic signals being out.