The Covid-19 Delta outbreak has spread to the capital, with a community case under investigation in the Wellington region.

HEB Construction has confirmed it was notified by Ministry of Health last night of a weak positive result in a worker in Wellington. He is not symptomatic and is double vaccinated.

Porirua doctor Bryan Betty, who is also head of the College of a GPs, has told Midday Report they were notified this morning of the case.

RNZ understands the construction worker has been in isolation since the weak positive test result earlier this week.

Dr Betty said it was a matter of when not if Covid would reach Wellington but it reinforced the urgent need for vaccination and the clock was ticking.

Porirua mayor Anita Baker told the programme she was very worried about the low vaccination rates in some areas, particularly Cannons Creek and Waitangirua.