Diversions are in place on Te Atatū Road, between McLeod Road and Divich Avenue, following a serious crash.
The crash between a vehicle and a cyclist was reported to Police around 7.40am.
At this stage one person is understood to have serious injuries.
Motorists are advised to take an alternate route and expect delays in the area.
The Serious Crash Unit has been advised.
Imogen Neale/NZ Police