Six people have been injured after the vehicle they were in rolled in Waikato.

Northern fire communications shift manager Jaron Phillips said due to the number of injuries suffered by the occupants, St John was required to send five ambulances to the scene.

Phillips says a member of the public raised the alarm after being woken by the crash which happened outside the Pirongia Golf Club on Kakaramea Rd at 3.50am today.

Emergency services arrived to find the vehicle had rolled and all six occupants injured; one critically, two seriously and three suffering moderate injuries.