UPDATE, 8pm:

SH25A between Kopu and Hikuai Road remains closed in both directions. It is expected to reopen overnight. 

Overnight updates - Highway conditions for Waikato (external link)

4.35pm:

State Highway 25A between Kopu and Hikuai Road is closed in both directions due to a truck fire.

Motorists are asked to follow the directions of emergency services. 

An update will be provided as the road status changes.