Police are in attendance at a serious crash near the intersection of Penrose and Barrack Roads, Mt Wellington.
Police were called to the collision between two vehicles at around 12.50pm.
Early indications are that a person may have suffered a medical event and is in a serious condition.
Penrose Road is currently closed between Ruawai Road and Barrack Road, while the Serious Crash Unit examines the scene.
Jarred Williamson/NZ Police