A mystery fireworks display that puzzled Aucklanders was part of a corporate event held at the Viaduct.

Earlier tonight many people took to social media in puzzlement about a professional pyrotechnics display.

Australian company Howards Fireworks tweeted that the display was "a VIP corporate special event at the ANZ Viaduct Events Centre".

Initially, it was thought the display could be part of the Navy's 75th celebration, but this was later confirmed not to be the case.