UPDATE 5.10pm: NZTA is now reporting that the incident blocking Auckland's Southern Motorway has been cleared.
Motorists can, however, expect significant congestion in both directions.
Update: The police incident on the Sthn Mwy is now clear. Expect significant congestion in both directions. ^LC https://t.co/2R39YZKApS— NZTA Akld & Nthlnd (@NZTAAkl) April 21, 2017
UPDATE 4.25pm: NZTA says three south-bound lanes are now open, and one north-bound lane is currently open.
However, long delays can still be expected for north-bound motorists.
Update: 3 lanes now open S-Bnd on Sthn Mwy. 1 lane remains OPEN N-Bnd. Motorists are advised to expect long delays heading north. ^LC pic.twitter.com/ZAkwHHsR3R— NZTA Akld & Nthlnd (@NZTAAkl) April 21, 2017
Updated 4pm: One lane has been reopened on the north bound side of Southern Motorway, both south bound lanes are open.
Update: 1 lane is now OPEN N-Bnd on Sthn Mwy. Motorists are advised to expect long delays heading north. 2 lanes remain open S-Bnd. ^LC— NZTA Akld & Nthlnd (@NZTAAkl) April 21, 2017
Earlier: NZTA are reporting that Auckland's southern motorway has been completely shut off to traffic in both directions due to a police incident.
A police spokeswoman said officers said they had concerns for a person's wellbeing, and said the motorway would be closed until the incident was resolved.
The north and southbound lanes are closed from Newmarket to Gillies Avenue, with the Gillies Avenue on-ramp also blocked off.
All traffic has been stopped before Mountain Road.