The search for a mother and her two children feared drowned in a northern NSW river is resuming with police divers from Sydney heading to flood-hit Tumbulgum.
The 43-year-old mother, her seven-year-old son and 11-year-old daughter were in the family car when it was swept into the swollen Tweed River on Monday afternoon.
An eight-year-old girl was able to escape as the car was washed into the water.
A police spokeswoman on Tuesday confirmed those in the car were all from one family.
Prime Minister Malcolm Turnbull reached out to their families and friends.
"We share the anxiety and concern of those who have loved ones that are missing in the floods," Mr Turnbull said.
The vehicle veered off Dulguigan Road in Tumbulgum into the raging Tweed River in the flood-ravaged region.
Police say the local community will no doubt be affected by the tragedy.
Tweed Byron LAC Chief Inspector Mick Dempsey said the car was about five metres from the northern bank of the river.
"I think it's gone from a rescue operation to a recovery operation," he told ABC radio on Tuesday.
The eight-year-old girl suffered only scratches and cuts but no life-threatening injuries.
"She's obviously traumatised by the incident," Inspector Dempsey told ABC radio.
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It's reported the road the car was travelling on was closed and covered in flood debris, but locals had been using to get to homes in the area.
"We're concerned it is a tragic event that will unfold over the evening and we understand that it is going to have a major impact on the family and the Tweed community," NSW Police Assistant Commissioner Jeff Loy told the ABC.
It's the latest tragedy in what's been a devastating few days for flood-hit northern NSW residents, with two women aged 36 and 64 confirmed dead and a man dying of a heart attack.
A massive clean-up operation is under way as communities pick up the pieces of ruined homes and businesses in the aftermath from Cyclone Debbie.
Lismore, Murwillumbah and Tweed Heads residents have been given the all-clear to return home after floodwaters washed through the region over the past four days.
NSW Premier Gladys Berejiklian and Prime Minister Malcolm Turnbull visited flood-hit communities on Monday to reassure locals they'll be given support.
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