A man has been critically injured after falling 20 metres while working on a temporary grandstand near Waikato Stadium in Hamilton.
The accident happened at 4:05pm.
A small section of the 20m tall stand, on a grass verge near Waikato Stadium, appeared to have collapsed.
Crews have been dismantling the grandstands from around the ITM 400 race track following the event late last month.
A witness, who lived nearby, heard a large crash and went to investigate.
"There was a sound of a lot of metal falling.
"I just heard it and thought, woohah, what's that?
"There was a man on the ground.''
The woman, who wished to remain anonymous, said a group of cable layers who had been working on her street jumped from their machinery and rushed to help the man.
"Then the first response vehicle showed up and now the ambulance is there.''
- Waikato Times