The Children's Minister Edward Timpson has criticised the report, claiming it did not explain why chances to protect Hamzah were missed.
Another source from the Department for Education described the report as "rubbish." Christine Talbot spoke to Professor Nick Frost, the man who oversaw the serious case review and asked him his response to those claims.
Justice Secretary Chris Grayling has told ITV News it is 'right and proper' for the Government to ensure tragic deaths like that of Hamzah Khan never happen again.
Earlier, children's minister Edward Timpson said a serious case review failed to address key questions.
He expressed his 'deep concerns' over the review's findings that the four year old's death could not have been predicted.
Mr Grayling supported his colleague's stand and said it was important no stone was left unturned in finding out what happened.
Calendar's Claire Ashforth has been to Bradford to find out how four year old Hamzah Khan was allowed to go unnoticed before and for two years after his death.
A woman who knew Amanda Hutton and her family has told ITV News that there was no way anyone could have realised that four year old Hamzah Khan had starved to death.
Hazel Dow spoke after today's controversial Serious Case Review into Hamzah's death.
She told Calendar:
"We had an inkling that maybe it wasn't great in that house. But I think nobody would have had a clue of how bad it was.
"Because there was a bit of a 'keep away' feel to the house we didn't want to intrude."
Local MP George Galloway gives his reaction to the publication of today's reportRead the full story ›
The children's minister Edward Timpson has requested answers to ten key questions following the publication of a serious case review into Hamzah Khan's death.
Here are some of them:
- Whether or not one of Hamzah's siblings was assessed by social care workers after reporting domestic violence to the police in December 2006.
- Why no assessment was carried out in April 2009 after police reported to social care that Hamzah's mother Amanda Hutton appeared to be "under the influence".
- Why an assessment was not conducted in January 2011 when the school of one of Hamzah's siblings reported low attendance rates and that the child "appeared physically neglected".
Aftab Khan says today's serious case review will not get to the bottom of how his son, Hamzah, was allowed to go unnoticed by authorities and starved to death in his cot aged four.
Hamzah's mother, Amanda Hutton was found guilty of manslaughter by gross negligence and sentenced to 15 years in prison.
The Hamzah Khan serious case review brings into sharp focus why there must be strong, joined up and effective systems in place to keep in contact with, and track, children at risk. No child should ever fall off the radar or become invisible, to child protection agencies and society as a whole.
Several key issues stand out. The report demonstrates powerfully the paramount need to keep sight of children who may be suffering neglect or abuse; the needs of vulnerable parents must never obscure focus on knowing what life is like for children. Talking and listening to them, as well as observing how their lives are affected, is an essential element of child protection practice.
The chair of a serious case review into four-year-old Hamzah Khan's death has said he will respond to the "constructive questions" in a letter from the children's minister about the report.
Professor Nick Frost said: "We will respond fully. We want to share information. We want to be transparent.
Bradford Council's director of children's services Kath Tunstall added that she welcomed the minister's intervention and said his "stringent questions" would help in the process of learning lessons for the future.