A head-on early-morning crash in the Kawaru Gorge served as a reminder for people driving after drinking the night before, police say.
Emergency services, including three fire engines from Cromwell, attended a two-car crash near Cromwell at 9.52am on Saturday.
Senior Sergeant Matt Scoles, of the Southern District Command Centre, said a man and woman were injured and trapped in their car for a short time.
The Otago rescue helicopter took the pair to Dunstan Hospital. It was believed the woman suffered a serious head laceration.
A woman, the sole occupant of the other vehicle, was not injured but taken to the Cromwell Medical Centre for observation, he said.
The road was blocked for a short time.
Scoles said the incident was still being investigated but alcohol was possibly a factor in the crash. People needed to remember alcohol took a long time to go through a person's system.
"Anyone planning to drive early in the morning needs to be aware alcohol could still be present in your system from the night before."
In another crash, about 6.30am on Saturday, emergency services were called to a car that had rolled on the Gibbston highway. St John Ambulance spokesman Ian Henderson said an ambulance was sent to the scene, however, a male patient left the scene before they arrived and they were unable to locate him.
A police spokesman said police were making inquiries with the registered owner of the vehicle. No other information was available.
In Southland, a car with three occupants crashed in Wyndham-Letterbox Rd about 8.32am yesterday.
St John sent two ambulances to the scene and two people were taken to Southland Hospital in Invercargill, one with moderate head injuries and one with moderate torso injuries.
- The Southland Times