The accident appears serious, writes Sørøst police district on X/Twitter.
The person who has been taken to hospital is a woman. The driver of the truck appears to be physically unharmed.
Operations manager Per Eftang in the Søreast police district tells NTB that they were notified of the accident at 9.10pm. No other people were involved in the accident.
– The Swedish Road Administration’s accident team has been notified. The same is true of crime technicians from the police. The scene of the accident has been secured and the woman has been flown to Oslo by air ambulance, says Eftang.
As a result of the accident, county road 313 Gamle sørlandske is closed.