Two people have been seriously injured after a two-car smash on State Highway 1 near Te Hana, north of Wellsford.
A third person had also been airlifted to hospital with moderate injuries, police said.
Emergency services were still at the scene of the accident, which happened about 1pm.
Police said diversions were in place - northbound traffic was being diverted from SH1 onto Matheson Rd and then to Waiteitei.
Southbound traffic is being diverted from SH1 to Mangawhai Rd and then to Waiteitei Rd.