TWO young children and their teenage sibling are being cared for by their grandparents after their father was killed and their mother remains in a critical condition following Saturday's horror crash on the Pacific Highway north of Woodburn.
Lismore police Inspector Bill McKenna said investigators were still trying to piece together what unfolded at about 11am, 2km north of Woodburn.
"We know that both the B-double and the car towing the caravan were travelling south on the highway and there has been a collision," he said.
"As a result of the collision the car towing the caravan has traversed into the north bound lane and had a head-on collision with the northbound Holden utility towing a trailer."
The 41-year-old father of the children, aged 14, 3 and 2, from the Wollongong suburb of Berkeley, who was driving northbound in a grey Holden Colorado towing a trailer, died in the crash.
His 34-year-old partner and mother of the young children suffered serious multiple trauma injuries and was airlifted to the Gold Coast University Hospital.
She underwent surgery on Saturday night and yesterday remained in a critical condition.
The 69-year-old man from the central Victorian town of Tallarook, who was driving the southbound SsangYong towing a caravan, was freed from his vehicle and taken to Lismore Base hospital with multiple fractures.
Yesterday he remained in a serious but stable condition.
His 72-year-old wife died at the scene.
Insp McKenna said officers had spoken to the parents of the 41-year-old man, who had identified their daughter-in-law.
"The parents are at Lismore Base Hospital to assist with the care of their three grandchildren and arrange their transport back to Berkeley," he said.
Insp McKenna said 13 people had been killed in 10 fatal crashes in the Richmond Local Area Command this year.
"Between Richmond and Tweed Byron Local Area Commands combined, 20 people have died on the roads this year," he said.
"This makes the Northern Rivers the number one area for fatalities in the state." Anyone with any information on the crash is urged to call Crime Stoppers on 1800 333 000.