Crash closes part of north-western motorway

No one was said to have been seriously injured in the motorway accident. Photo / File

Up to four people were injured in a crash that closed part of Auckland's north-western motorway this afternoon.

The NZ Transport Agency said about 12.40pm that State Highway 16 after Royal Road, west-bound, was closed just after the Royal Road on-ramp and Hobsonville Road.

Emergency services are at the scene, where a car crashed earlier.

No one is thought to have been seriously injured in the accident.

A police spokeswoman said the crash was thought to have involved three vehicles.

All lanes reopened at 12:56pm according to a tweet from the agency, but there was still congestion.

FINAL UPDATE - #SH16 after Royal Road (westbound), all lanes now OPEN. Please be patient while congestion eases ^NA

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) July 30, 2016