Two people are in a serious condition after a four-car pile-up which has closed State Highway 1 north of Auckland.

Police are attending the serious crash which happened at the intersection of Moir Hill Rd on SH1, between Puhoi and Warkworth at about 5.50am.

A third person received moderate injuries.

One patient has been taken to hospital by helicopter and the two others are receiving treatment at North Shore Hospital.


NZTA confirmed SH1 is closed to southbound traffic at Warkworth and a detour is in place along SH16.

The road is expected to be open by 9am.