A man taken into custody after a fatal car crash in the New South Wales Riverina that killed a woman and three children, is expected to be charged.
Police said the car crashed into a pole and rolled down an embankment at the intersection of Research Road and Toorak Road in Yanco, south of Leeton last night.
The car landed on its roof in a water channel and all four occupants died at the scene before emergency services arrived.
The occupants are believed to be a 36-year-old woman, and three boys aged 10, 11 and 12.
Police this morning arrested a 32-year-old man and a 50-year-old woman in Griffith in relation to the incident.
The woman has been released without charge, while the man remains in custody and is expected to be charged in relation to the incident.
Acting Assistant Police Commissioner Tracy Chapman said police remained on the scene through the day.
"At the end of the day, this is a tragic set of circumstances that a mother and some children have been involved in," she said.
"Our thoughts go out to their family and friends, and members of the community."
Leeton Mayor Tony Reneker said he understood the family were local to Yanco, and the community had been rocked by the incident.
"It's just a feeling of despair," he said.
"It's terrible news to wake up to, people are just shocked.
"To have one or two people killed is a tragedy, but four is unbelievable."
Local shop owner Karen O'Grady said news about the crash had left the community "reeling".
"There have been accidents down there previously but nothing as devastating as this," she said.
She said the three boys were supposed to participate in an Easter celebration on Wednesday at the local school.
"Everyone’s saddened by the news and the kids are very devastated," she said.
The NSW Department of Education said counsellors and extra staff were at local schools on Wednesday to support staff and students.