A man has been arrested over a crash on the A14 in Cambridgeshire which left a car passenger with life-threatening injuries.
A woman driving a Vauxhall Zafira and her male passenger suffered head injuries in a crash with an Audi which failed to stop at Stow-Cum-Quy.
The man also suffered a broken neck in the crash on Sunday. Both are from Cambridge.
A car has been seized and a 28-year-old is due to be questioned, police said.