A crash on Whakatu Drive has closed the state highway to Richmond-bound traffic and left one person in a serious condition.
A diversion has been set up at Quarantine Rd and down Nayland Rd for traffic heading towards Richmond.
The accident, at around 12.20pm today, involved two cars, say police.
Motorists are asked to delay travelling through the area while emergency services attend the scene, said a police spokesperson.
