Victoria Police divers are due at the Murray River by 9am to continue searching for the boy after initial attempts to find him last night failed.
New South Wales Police have found the body of a young boy in the Murray River near Moama, while the child's mother has been remanded in custody on a charge of attempted murder.
It then emerged that a five-year-old boy who was related to the injured boy was missing.
The dog's owners say it helped to rescue the lad from the Murray River near Moama, Australia.
She appeared before Deniliquin Local Court earlier today in relation to the nine-year old boy's injuries.
She had already been charged with attempted murder, and in a brief hearing, the town's tiny courtroom heard she is likely to be charged with more offences.
The children had been in the care of their grandparents and their grandmother remains by the nine-year-old's side at the Royal Children's Hospital in Melbourne.
The father of the boys has spoken of his devastation and said he was numb after learning about what had happened.
The woman, from Deniliquin, is expected to be extradited from Victoria to NSW to face charges after handing herself in to police at Echuca on Thursday night.
Police at the scene of last night's dog attack on the nine-year-old boy who is now in a Melbourne hospital.
"We had made considerable representations to Family and Children Services and the Department of Correctional Services about the imminent risk posed to the little boys with their mother's release from prison", the statement read.
Mr Brooks said his client blamed authorities for the tragedy because they had essentially "off-loaded" the woman, further exposing the grandmother to violence and physical harm.
Jared Kushner met with Russian ambassador during transition, White House official says
Congress doesn't declare "executive privilege" on behalf of the executive branch. Benjamin Cardin of Maryland days before the January 20 inauguration.
"The mother in this instance has been a really troubled individual, she's been a long term ice addict".
The woman had allegedly told onlookers "I had to drown my babies".
The boy is now in a stable condition in hospital, police said.
The court was told the boy was able to wriggle free when his younger brother started screaming on the riverbank and the mother turned around.
After escaping from his mum, the older boy was "savagely mauled" by a dog.
The distraught owner of the dog, named Buddy, told reporters the pit bull was trying to save the boy.
He said the grandmother had complained to government agencies numerous times about the woman's behaviour and tried to get her removed from her home.
The daughter then "snatched" the children in the grandmother's vehicle. Others said that while they did not know the mother personally, they knew of her and her "problems".
The couple had taken out an apprehended violence order against their own daughter in May previous year, which required that she not "assault, molest, harass, threaten or otherwise interfere with" her mother, as well as orders that she should not approach her mother within 24 hours of consuming liquor or illicit drugs.
"I think they (the agencies) have some culpability in this case".
Buddy the four-year-old dog.