The police commissioner for Norfolk has said he will be holding the chief constable "robustly" to account over the deaths of four people in Costessey.
The bodies of four members of the same family were discovered at a home in Allan Bedford Crescent in the Queen's Hills estate on Friday morning after a neighbour raised concerns with police.
Structural engineer Bartlomiaj Kuczynski, 45, Jasmin Kuczynska, 12, and her seven-year-old sister, and a 36-year-old woman, were found 7.15am after police forced entry to the property.
It was later revealed that the police did not respond to a 999 call from the address an hour before the family were found dead.
It is understood that Mr Kuczynski made the call at 6am but police did not deploy resources to the address.
Following this revelation, the force referred itself to the Independent Office of Police Conduct (IOPC).
Giles Orpen-Smellie, the Police and Crime Commissioner for Norfolk, said he would be holding the chief constable, Paul Sanford, to account.
"The deaths of four members of the family was a terrible tragedy," Mr Orpen-Smellie said.
"I would like to express my heartfelt condolences to all those who have been affected by what has happened.
"I would like to assure the residents of Norfolk that, on their behalf, I will be holding the chief constable to account robustly for the actions of his officers and staff."
He added that the IOPC will investigate what took place and the public should have faith in the 999 system.
Norfolk Constabulary has been contacted for comment.
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