Motorists are advised to avoid the area and expect delays.
Fire and Emergency NZ confirmed it was attending the incident.
UPDATE 1:35PM SH2 Masterton is CLOSED due to a serious crash between Ngaumutawa Rd and Judds Rd. Northbound road users please detour via Ngaumutawa Rd and Judds Rd. Reverse for southbound travellers. ^SG https://t.co/i8xXfBNJ2D
— Waka Kotahi NZTA Wellington (@WakaKotahiWgtn) April 5, 2024