A young man remains in a critical condition in Christchurch Hospital after being involved in a head-on collision yesterday morning, 1km east of the Arthur's Pass township.
Darfield Police Station senior constable Dave Watkins said today the driver of one of the vehicles, a man in his early 20s, suffered life-threatening injuries.
He was flown to Christchurch Hospital in the Westpac Rescue helicopter.
The crash happened about 10am. Police said one of the vehicles was travelling towards Arthur's Pass and the other to Christchurch when they collided head-on.
Mr Watkins said the seriously injured man was heading towards Arthur's Pass and the Christchurch couple in their 50s were travelling in the opposite direction.