The road reopened just after 5.25pm but queues continued to cause delays.

A building fire has closed SH1 north of Wellsford in Auckland.

A fire has shut key transport route in Blenheim, with emergency crews at the scene and motorists facing delays.

Emergency crews were called to the blaze about 6.45am.

Drivers are being warned to expect delays and avoid affected routes.

Motorists are being diverted through alternate routes and warned of delays.

The road reopened just after 5.25pm but queues continued to cause delays.