Cordons are in place at the intersection of Maraetai Drive and Maraetai School Rd, and at the roundabout at Whitford-Maraetai Rd and Beachlands Rd.
They are expected to remain in place for most of the afternoon, police said.
Buses are unable to pass in either direction and will be cutting their journeys short on Beachlands Rd, Auckland Transport said.
With the road blockage, 739 buses are unable to pass in either direction. They will be ending their journeys at stop 2366 at 136 Beachlands Road and beginning from stop 2365 opposite 136 Beachlands Road. https://t.co/rnhqNTLD33pic.twitter.com/W1Sg0MAoyL
— Auckland Transport Travel Alerts (@AT_TravelAlerts) July 28, 2021
The road is closed and drivers are urged to avoid the area.