The most recent post on the Waka Kotahi NZTA Auckland & Northland twitter account.
A Fire and Emergency NZ spokesperson said two fire trucks and a support vehicle were at the crash scene involving a car and truck.
The New Zealand Transport Agency this morning warned motorists delays were possible in the area with emergency services responding to a serious incident.
The area affected was close to the outskirts of Dargaville on SH14, near the intersection with SH12.