The spokesman said five people had suffered injuries – one critical, three serious and one moderate.
A police spokesperson said SH30 had been closed between Kopaki and Maraekowhai.
“Motorists are advised to follow diversions and expect delays,” police said.
It comes after a person was airlifted to hospital last night following a crash on SH39 in Waikato involving three cars and a truck.
The four-vehicle collision was reported to emergency services about 9.45pm and blocked Ormsby Rd, between Parihoro and Cannon Rds, Tihiroa.
“Initial indications suggest one person has critical injuries and will be airlifted to hospital, while another person has moderate injuries,” police said last night.
The road was closed for some time as the Serious Crash Unit responded.