Two people were injured, one critically, after a crash near Raetihi on Sunday night.
Police said the two-vehicle collision occurred on Pipiriki-Raetihi Road shortly after 6pm.
St John said two people were injured in the crash, with the Palmerston North and New Plymouth rescue helicopters sent to the scene.
Both patients - one critically injured and the other seriously - were airlifted to Whanganui Hospital.
Police said on Monday morning the critically injured patient was subsequently transferred to Wellington Hospital, and remained in a critical condition.