A large freight truck with hazardous goods on board has rolled in Wairarapa, blocking a highway overnight.
A Fire and Emergency spokesman said the truck crashed on State Highway 2 north of Masterton just after midnight, blocking the highway.
The driver escaped without injuries but the truck's cargo included dangerous material. The spokesman said a specialist hazardous substances unit was at the wreck.
He did not know what the threatening product was.
Up to six fire crews and police were still at the crash.
