A massive fire has engulfed the under-construction Sky City convention centre in central Auckland.

Masses of black smoke are billowing into the Auckland skyline and people can be seen on the roof of the building.

A witness said she could see billowing black smoke coming from the Sky City Convention centre in Auckland central.

The thick plumes of smoke have darkened the sky surrounding central Auckland streets.

Police are establishing cordons and people are massing to watch in stunned silence.

The construction worker said the fire started on the roof.

The nearby hotel had also been evacuated.

[Source: Stuff.co]