A pensioner remained in a "serious but stable condition" following a crash which killed three members of her family, police said today.
A lorry driver was due to be questioned after being arrested on suspicion of causing death by dangerous driving following the collision between a truck and a Renault Megane Scenic on the B1404 between Houghton-le-Spring and Seaham, County Durham, yesterday.
The collision on a 60mph section of road killed a one-year-old baby girl, an 18-year-old woman and a 75-year-old man who was believed to have been driving. The family were from the Houghton-le-Spring area.
A 74-year-old woman was flown by helicopter to the James Cook University Hospital, Middlesbrough, and Durham Police said she "remains in a serious but stable condition".
The 42-year-old driver of the Volvo truck, which crashed through a hedge and ended up in the middle of a fairway at Sharpley Golf Club, was expected to be questioned about the accident later.
Simon Weightman, a farmer who diversified to build the golf club, said: "I suddenly saw a lorry in the middle of the fairway. Then I saw a person get out and collapse on the ground.
"Some golfers playing that hole turned out to be detectives and they were very quickly on the scene of the crash.
"The bang was so loud I thought it must have been a head-on collision.
"The lorry's fuel tank was ruptured as if the lorry had gone over the car. I got a quick glimpse of the car but it was very traumatic to see it. Golfers who saw it came off the course. They could clearly see it was awful."
Mr Weightman said the crash happened on a 60mph stretch of road, close to the bottom end of the course.
He said: "After the collision it had gone through the old hedge, through the new one, up an embankment, over the top of some five-year-old trees and into the fairway.
"Fuel was running out of its tank.
"The front of the lorry was damaged and the tyres were ruptured.
"The driver of the lorry only seemed to get 30 yards from the vehicle and then collapsed."
Mr Weightman said there had been several bad crashes on the stretch of road since he moved to the farm in 1989 and it was the third time the air ambulance has attended.
"There has been a lot of vehicles go through the hedge and that has generally been associated with speed.
"We really should have a 50mph limit here," he said.