A pedestrian has died after a car hit two groups of people.
Police responded after a Volvo collided with two groups of two people in north Somerset - killing an 18-year-old man and injuring three others.
The incident happened shortly after 5am in Clevedon Road in Nailsea.
Avon and Somerset Police said the car struck two men - believed to be aged 18 and 20 - and then collided with a man and a woman in their late 20s before hitting a telegraph pole.
The 18 and 20-year-old men were taken to Southmead Hospital in Bristol with life-threatening head injuries, the younger man dying shortly afterwards. The other man remains in a critical condition.
The woman in her late 20s was also taken to Southmead Hospital - she is not believed to have suffered life-threatening injuries. The man she was with was allowed home after treatment at the scene.
The driver of the car was arrested on suspicion of drink-driving at the scene and remains in police custody.
A force spokesman said: "The road remains closed for a detailed inspection by collision investigators.
"It is likely to remain closed for most of the day. We are keen to hear from anyone who was in the area at the time of the incident who may have information to help our enquiries."