The post mortem examinations into the deaths of two young sisters who were found dead at a home near Norwich are expected to take place today. 

Police were called to Allan Bedford Crescent on the Queen's Hills estate in Costessey at around 7.15am on Friday after a member of the public raised concerns for the welfare of people inside.

Officers forced their way into the property and found the bodies of four people.

Norwich Evening News: Police scene in CotesseyPolice scene in Cotessey (Image: Denise Bradley)

READ MORE: Everything we know so far about the deaths at a home near Norwich

Police confirmed that Jasmin Kuczynska, 12, and Natasha Kuczynska, nine, were among those found dead at the home. 

Bartlomiej Kuczynski, 45, the girls' father and a structural engineer, and Kanticha Sukpengpanao, 36, the girls' maternal aunt, were also identified. 

Post-mortem examinations were carried out on Mr Kuczynski and Ms Sukpengpanao on Sunday.

Mr Kuczynski died as a result of a single stab wound to the neck while Ms Sukpengpanao died from stab wounds to the neck. 

Police confirmed that post mortem examinations on the two girls are expected to take place today. 

It was revealed this weekend that 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 until receiving another call at 7am from a concerned member of the public.

The Independent Office for Police Conduct (IOPC) is now investigating the force in relation to the call.

The IOPC's regional director, Charmaine Arbouin, said: "During that call the man expressed concerns for his own mental state saying he was confused.

"He was advised to seek medical advice and police did not attend.

"At around 7am the force received a call from a dog walker concerned for the welfare of those within the home."