Photo: Getty Images

A serious crash has closed State Highway 1 in the Greta Valley tonight.

Police said they were called to the two-vehicle crash just south of the Hurunui River bridge, in North Canterbury, about 7.15pm.

NZTA is confirmed State Highway 1 is near Stonyhurst Rd, about 35km north of Waipara.

Drivers were urged to avoid the area.

- APL