A premature baby girl who was delivered as her car crash victim mother died has also lost her fight for life.
Police have been carrying out a detailed examination of the scene
Lisa Scott, 30, and her 28-year-old husband Duncan were killed when their vehicle collided with a police car in Irvine, Ayrshire, on Saturday night.
Police said the baby was one month premature when she was delivered by emergency caesarean section at Crosshouse Hospital, in Kilmarnock.
Two police officers suffered minor injuries in the crash.
Hospital staff had said the baby was in a serious condition after being delivered but on Sunday afternoon Strathclyde Police announced that she had died.
Mr Scott's father John, 66, told the Daily Record newspaper: "I can't believe
all three of them are gone on the same day.
"It was to be their first child as a couple. I saw Duncan in hospital and I
didn't even recognise him. The shock of seeing him lying there was terrible."
Mr Scott said he had no idea how the accident happened.
He added: "They were a great couple. I can't take in that we've lost them
all. We just can't work out what happened. It's a straight road about five
minutes' walk from their house.
"No one knows why they were out in the car at that time. We're devastated."
Police said Mrs Scott, of Girdle Toll, Irvine, was driving a Ford Fiesta which was in collision with the police car on Towerlands Road at the junction with Pladda Avenue, East Broomlands, at about 2345 GMT on Saturday.
A police spokesman said: "Lisa Scott was eight months' pregnant and her baby was born by caesarean section.
"The baby girl, who was delivered at Crosshouse Hospital, died earlier this afternoon.
"A full investigation into the circumstances surrounding the crash will be carried out and a report sent to the procurator fiscal."
The police car was not thought to have been involved in an emergency call at the time.
Officers have set up an incident room following the Irvine crash and have appealed for witnesses to contact them on 01292 664 098.
The couple were among eight people who died on Scotland's roads within 72 hours.
A man died in a crash on the A820 Dunblane to Doune Road
A 40-year-old man was killed when a car being driven by a 16-year-old crashed in Dunblane.
The accident happened near the Argaty junction of the A820 Dunblane to Doune Road at about 2250 GMT on Saturday.
A spokesman for Central Scotland Police said a Vauxhall Corsa was travelling east when the young driver lost control. His passenger suffered fatal injuries.
The driver received minor injuries and has been detained in Stirling Royal Infirmary for observation.
In the early hours of Saturday, Niall Horne, 17, and Craig Wright, 16, both from Elgin, died in a crash near Birkenhills on the A941.
The 23-year-old driver of the other car was taken to Dr Gray's Hospital in Elgin with minor injuries.
A man and a woman were killed following a three-car crash on the A75 near Collin in Dumfries and Galloway on Friday afternoon, while a 72-year-old died in an accident on the A6094 near Rosewell earlier that day.