The Auckland Council's Pollution Response Team are at the scene investigating after a truck carrying a tanker of leachate rolled in south Auckland.
Leachate is the hazardous liquid that has drained from a landfill.
The accident happened around 8.30am on Sunday and the truck driver was trapped in the cab for about an hour, leaving him in a serious condition.
It appears the truck tipped while taking a corner, although the exact details as to why it tipped are not yet known. Wiri Station Road is closed at the intersection.
More to come.