A Pennsylvania mother-daughter duo is in custody following an alleged murder-suicide attempt that left five family members dead.

ABC News reports Shana Decree, 45, and her daughter, Dominique Decree, 19, were arrested by the Morrisville Police Department early Tuesday morning. Shana was charged with five counts of murder and one count of conspiracy. Her daughter Dominique is expected to be arraigned on the same charges later in the day Tuesday.

A caseworker from Bucks County Children and Youth Social Services discovered Shana and Dominique in their apartment with the dead bodies of their relatives on Monday, CBS News reports. The worker attempted to make a wellness check at Morrisville's Robert Morris Apartments the day prior and grew concerned after being unable to contact anyone in the apartment.

The caseworker gained access to the home with the help of a maintenance person and discovered the mother and daughter in bed. One of the suspects was convulsing and the other unconscious; they appeared to be awaiting their death via suicide. The police were called to the scene, and the Decrees were immediately transported to the hospital.

The Morrisville police then discovered the bodies of five family members in a small, separate room; two were piled atop each other.

The five victims were all close family members who lived in the home with the two suspects. The deceased include Shana's children (and Dominique's brothers) Naa'Irah Smith (25) and Damon Decree Jr. (13), as well as Shana's sister, Jamilla Campbell (42) and Campbell's twin daughters, Imani and Erika Allen (9).

Shana and Dominique reportedly told police everyone in the household wanted to die.

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There are currently no other suspects in the case. Bucks County District Attorney Matt Weintraub appeared visibly distraught during a press conference Tuesday.

"To be able to resolve a case in which five people were murdered within the course of a half a day and have the two people responsible locked up and facing justice is amazing and a true testament to the quality of law enforcement that we enjoy here in Bucks County," Weintraub said.

According to an affidavit, Shana and Dominique spoke to the police separately and had similar stories.

Initially, both mother and daughter told police they didn't know what happened. Later, Dominique reportedly told the police that an unknown male, along with her aunt's boyfriend, caused the visible injuries to her neck.

Her mother, Shana, echoed the story, stating her sister's boyfriend and two unknown violent men came into the apartment and killed everyone else except for her and her daughter.

During her questioning, police said Dominique stated several times her desire to die.

After her first round of questioning, Shana began to claim everyone in the household had been suicidal and wanted to end their lives, including her 9-year-old nieces and her 13-year-old son.

Dominique and Shana are said to have given detailed descriptions of how each person died, with their stories varying slightly. They both claimed Jamilla Campbell, Shana's sister, assisted with the killings before her death.

The police found Campbell's 17-year-old son, Joshua Campbell, safe and unharmed. The teen is not considered a suspect and was not present at the scene of the crime.

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