A New Jersey woman has pleaded guilty to fatally knifing her identical twin sister during a drunken argument that she claims not to remember.

Amanda Ramirez, 27, of Camden, took a plea deal for second degree manslaughter on Thursday after she initially denied stabbing Anna and later claimed self-defense.

The siblings fought outside Centennial Village Apartments complex, at around 5.30am on June 22, when the incident happened and police were called.

Ramirez said it started after a heavy night of drinking and that she could not remember why the pair were arguing, according to KYW.

Amanda Ramirez (above), 27, pleaded guilty to a charge of second degree manslaughter a downgraded charge on Thursday, that could see her spend between three and 10 years in prison

Amanda Ramirez, 27 (left), stabbed her identical twin sister, Anna Ramirez (pictured in May, right), to death. They incident happened as part of a drunken argument between the siblings, she claimed not to know why or how it began

This undated photo shows Anna and Amanda Ramirez (dressed in identical outfits) as young girls posing with their cousin

Ramirez claimed that Anna picked-up the knife and charged towards her but later changed her story.

Court documents revealed that a witness saw Amanda grab the knife and threaten her sister, yelling: 'Watch what I'm going to do.'

After she plunged the knife into Anna's chest she screamed: 'Amanda, you stabbed me!' according to NJ.com.

Ramirez admitted to putting the knife on the ground and another person, who was with the twins at the time, took it inside while Ramirez stayed with her sister.

Upon police arriving at scene on 1200 block of East State Street, Anna was unconscious and was rushed to Cooper University Hospital where she later died.

Just hours before Anna was killed pictures of the sisters were uploaded to Facebook showing them both smiling and posing alongside two friends.

Police who attended the incident noticed scratches on Amanda's face as well as dried blood in her ear and a finger laceration, according to court documents.

These images taken less than two hours before the stabbing death of Anna Ramirez, 27, show her spending time with her twin sister, Amanda, a cousin and a friend. Anna wears her her long black hair down, while Amanda has her hair slicked in the front

This undated photo shows Anna (left) and Amanda (right) with their female cousin in the middle

Facebook photos show Anna in June (left) and in 2018 (right). Her obituary said she was a nursing assistant who 'enjoyed family dinners and weekly time hanging out with her sisters'

During preliminary hearings Ramirez was seen sobbing throughout proceedings as she stood with her feet and wrists shackled.

Her family who sat behind her were also seen wiping away tears.

No motive for the stabbing was concluded in court but previous claims included a love triangle and Ramirez's own belief that she cannot remember the fight at all.

A third sister, Monika Medina, 19, disputed the claim that they would 'fight over a man' to the New York Post.

'They would argue like cats and dogs, but stuck together like thieves... Amanda and Anna's bond was one of the tightest. Inseparable!'

'We don't believe this was a jealous act nor [done] purposely. We believe she didn't do such a thing,' said Medina, who maintains Ramirez is 'still in shock.'

The deceased previously lived with her boyfriend of two and a half years, Luis Rivera, while her sister had been in a relationship for a 'couple years,' Medina added.

Ramirez burst into tears as soon as she entered the courtroom on June 27, shacked at the wrists and ankles

Why Ramirez stabbed identical twin sister, Anna Ramirez (pictured in May, above), is still unknown. One claim that it was part of a love triangle was rejected by a family members. Ramirez claimed not to know why it occurred.

However, the judge sided with prosecutors and ordered Ramirez to be remanded in custody without bail, prompting her tearful exit from the court room

As she exited one of the hearings two individual family members could be heard shouting 'Love you' and 'Keep your head up, sis,' according to NJ.com.

In a courtroom video from Thursday Ramirez confirmed the timeline of the evening and admitted that her recklessness led to the death of her sister.

The twins' aunt Elizabeth Class told NBC New York that everyone was suffering.

'It's an immense pain for the family,' she added.

Ramirez struck a plea deal which downgraded her aggravated manslaughter charge to one for second degree manslaughter.

She could face between three and 10 years in state prison at her sentencing on November 15.

As she left, her family members called out ‘love you’ from the gallery, with one woman telling her ‘Keep your head up, sis’ on June 27