Octavia Rogers, 29, allegedly murdered and partially dismembered her three young sons

The mother and her three young sons who she allegedly stabbed to death before trying to kill herself in Phoenix have been named.

Octavia Rogers, 29, allegedly murdered and partially dismembered Jaikare Rahaman, eight, Jeremiah Adams, five, and two-month-old Avery Robinson.

Rogers, who was identified by her mother, killed the children before stuffing them inside a closet and a suitcase, Phoenix Police Sergeant Trent Crump said.

Police say the 29-year-old mother to the three boys stabbed herself in the neck and abdomen, claiming she was pregnant.

She is in a critical condition in hospital but is expected to survive.

The children's grandmother, Tanella McCoy, said Rogers was a 'good mother' and did not appear to be having any problems with her children.

'I don’t know what to feel right now. I don’t know where to go, I don’t know where to turn,' Ms McCoy told The Arizona Republic.

'My daughter knew beyond a shadow of a doubt that I would take her kids ... because there were times she would talk to me about leaving for the summer.'

McCoy said Avery was a 'very good baby', adding that Jeremiah was her 'muscleman' and Jaikare was a 'book scholar' with a bright future.

Sgt Crump said Rogers' brother got off from work and returned to the house - which is owned by the children's grandmother - at around 2am on Thursday.

The brother explained that he was speaking with Rogers in the garage when she started talking 'about religion and how she had found the answer'.

He said that she locked him out of the home, and then broke inside to find her in the bathroom with multiple stab wounds.

Rogers allegedly murdered and partially dismembered Jaikare Rahaman, eight, Jeremiah Adams, five, and two-month-old Avery Robinson

Rogers (pictured with Jaikare and Jeremiah), who was identified by her mother, killed the children before stuffing them inside a closet and a suitcase, Phoenix Police Sergeant Trent Crump said.

He immediately called 911 and went to get towels to help her wounds, but then she attempted to drown herself in the bathtub, he said.

Rogers reportedly told her brother that she was pregnant while stabbing herself in the abdomen. Officials are still trying to determine if that was true or not.

When the woman was being treated by emergency crews, she told them that her children were with someone else, Sgt Crump stated.

However, when authorities entered the home, they made the grim discovery of finding the two children stabbed to death inside of a closet.

Upon a second search and after speaking with family members, they went back inside the home and found the infant inside of a suitcase within the closet.

It was an 'absolutely horrific scene for the officers and the brother,' Crump said.

Police say Rogers stabbed herself in the neck and abdomen, claiming she was pregnant, after her brother returned from work

Rogers is in a critical condition in hospital but is expected to survive. Pictured above is the crime scene

Sgt Crump said Rogers' brother got off from work and returned to the house - which is owned by the children's grandmother - at around 2am on Thursday. Above is the crime scene

The tragedy unfolded in a home that belonged to the woman's mother, who Crump said was 'speechless' and does not understand how something like this could have happened. Above investigators stand outside

Rogers is currently hospitalized in critical condition, but is expected to survive, Crump said.

'She will be in the hospital for some time with some very serious self-inflicted injuries,' Crump said. 'It's a murder investigation at this point.'

Rogers, who was raised in Phoenix but moved to Virginia two years ago, recently moved back to the area for the birth of the two-month-old baby boy.

Crump said during a press conference later in the afternoon that they are not aware of the woman suffering from any mental illness.

The woman's family members have no answers and 'don't know what set this off,' he added said.

The woman and her children live with her brother and the siblings' mother, Crump said. 'There's no father in the picture.'

Crump said that it was an 'absolutely horrific scene for the officers and the brother'' Above a Phoenix police detective stands outside of the home

In addition, the woman may have been pregnant with a fourth child, but that is still trying to be determined. The woman is currently hospitalized in critical condition, but is expected to survive. Investigators are pictured above

Neighbor say the incident is 'heartbreaking' and that the older boys were nice and playful. Pictured above is the crime scene

He added that if the mother survives, she will face at least three homicide charges.

Next-door neighbor Shelley Severns says she didn't know the family but that her children played with the two older boys, who she called 'cute little things'.

Ms Severns says the boy's deaths are tragic and that she is still processing what happened.

Another neighbor says the older boys were nice and playful and that the boys' deaths are heartbreaking.

'Kids are supposed to feel good in this neighborhood,' said Frank Segura, who lives across the street. 'It's heartbreaking. They're just nice kids.'