A man has died and a woman has been seriously injured after they were knocked down by a runaway car which rolled down a hill.
Police were called to a lane just off Brynmill Crescent in Swansea at around 9.20am today amid reports of two people being trapped under a blue Peugeout.
An eyewitness described the aftermath as horrific.
A neighbour, who did not want to be named, said: "I came out my back garden and saw two people trapped under a car. The woman was screaming her head off. How the whole street didn't hear it, I don't know.
"I immediately rang 999 and told the operator they would need to get all the emergency services here. It looked very serious.
"The couple had just come back from shopping when they were run over by their own car.
"It's awful, they were a lovely couple.
"I didn't know their names but they would always say hi and were very polite.
"I just hope I got there quick enough and the woman survives."
South Wales Police said initial reports were a vehicle had rolled down the street trapping a male and female underneath the vehicle.
A spokesman said: "The female has been conveyed to hospital by air ambulance.
"The male sustained fatal injuries."
Mid and West Wales Fire and Rescue Service added it had released two casualties from underneath the vehicle.
The Brynmill area, where the accident occurred, is home to many students in Swansea.
Local councillor Peter May said he was shocked to hear of the incident.
He said: "Looking at the scene, it appears that the vehicle must have run down a hill from a back lane just off Brynmill Crescent.
"The people in the street are naturally very shocked at what has happened.
"There is a lot of uncertainty as to whether it was someone known to us."
A flatbed lorry was seen taking away a dark blue Peugeot 406 from the scene just before police lifted the cordon at around 2pm.