One man has died and two others have sustained life-threatening injuries after a multi-vehicle crash.
The incident took place on the A1M near Doncaster, South Yorkshire, when a silver Vauxhall Astra drove into the back of an HGV at just after 6.10am this morning.
The car then collided with the central barrier and came to rest across the inside lane with the HGV pulling onto the hard shoulder.
A different truck pulled into the hard shoulder to try and help, but then a third lorry crashed into the back of that.
The driver of the third HGV, a 47-year-old man from Leeds, was killed and the two passengers from the same vehicle sustained multiple, life-threatening injuries.
One of the men, a 58-year-old from Redditch, is being treated at the Northern General Hospital in Sheffield. The other, a 35-year-old man from Bedford, is being treated at Doncaster Royal Infirmary.
A South Yorkshire Police spokesman said: "The driver of the Vauxhall Astra, a 26-year-old man from Doncaster, has been arrested on suspicion of dangerous driving."
The northbound carriageway of the A1M was closed at J36-37 for over eight hours as a result of the incidents.