It happened just before 3pm on the A386 near Bideford and involved a BMW, a Vauxhall Astra and a Citroen Dispatch.
A 41-year old woman from Torrington, who was passenger in the Astra, died at the scene.
A 29-year-old man from Bideford was detained on suspicion of causing death by dangerous driving - he was later released under investigation pending further enquiries.
Police are appealing for witnesses.
Man arrested after woman dies in Exeter
He's believed to have known her
MPs push for better broadband speeds
Devonians face connectivity cliff-edge
Plymouth roads shut over fear of flats collapsing
Drivers run red lights
Officers deal with stabbing and collision
Hectic weekend for police
Tavistock Spoons could open later
Cheers! Or tears
New space relieves pressure on Torbay A&E
'See and treat' unit opens
