A crash is causing major delays on State Highway 2 in Wellington this afternoon.

The crash is blocking the left lane, north-bound, on SH2 near Horokiwi.

It is not yet known whether anyone has been injured.

The NZ Transport Agency said just before 5pm the delays were significant.


Video footage shows long lines of vehicles moving slowly.

Motorists are being urged to find alternative routes or to expect delays.

"Allow extra time,'' authorities said.