Police are looking for witnesses to a crash that killed a man on River Rd in Tuakau last week.
Around midday last Tuesday a John Deere sprayer tractor collided with a black Nissan Patrol near Port Waikato Bridge.
Part of the road was closed for several hours while a chemical spill caused by the crash was cleaned.
The driver of the Nissan Patrol later died in hospital from his injuries.
Constable Paul Evatt from the Counties-Manukau Serious Crash Unit says police are unable to release the man's name at this stage.
"Our thoughts are with his family at this difficult time and our investigation into the cause of the crash is continuing.
"We are very keen to hear from anyone who may have witnessed the crash or seen the two vehicles in or near that area around midday," says Constable Evatt.
Anyone with any information is urged to call police on 021 192 1527 or call Crimestoppers anonymously on 0800 555 111.
Newshub.
