A Westport mother and her young daughter were found dead in their lavish mansion late last week in a shocking murder-suicide.

Police and the Office of the Chief Medical Examiner revealed on Friday the cause of death of Tracy Do, 46, and her 7-year-old daughter, Fox News reported. Do reportedly died of seemingly self-inflicted “sharp-force injuries [to the] torso and extremities,” while her toddler daughter Layla Malon died of drowning, in what has been ruled to be a homicide.

On Thursday, Do’s other daughter, 13, came home and was left aghast to find her mother dead in the foyer inside the family's $1.4-million mansion at Lyndale Park and Weston Road.

Authorities immediately attended to the scene and found Do’s body first before discovering her slain 7-year-old daughter.

"At that point, the officers checked the interior of the house to see if there was anyone else inside, and unfortunately, that’s when they found the body of the seven-year-old child," Lt. David Wolf of the Westport Police Department, Fox 61 noted. "We spent a great deal of time processing the scene along with the state police major crimes, and we’re going to be continuing doing that throughout the day."

Westport Police Chief Foti Koskinas expressed his grief marking the incident as a “horrible tragedy.” Authorities have refused to release additional details about the case with respect to the Do family.

However, Connecticut Superior Court documents show that Do and her ex-partner, Eric John Malon, had an ongoing custody dispute over two daughters, the New York Post reported.

Court records revealed that Do sued John Malon for custody of their children and also filed another suit for “breach of contract, claiming she worked for her partner’s company for years without compensation and that he had promised to give her and the children a home in Westport if their relationship ended.”

Records show that her partner, in return, filed twice to evict Do from the Lyndale Park home, and just last week, a judge granted Do an extension until July 16 to file her response to the most recent eviction attempt, the Hartford Courant revealed.

Authorities, together with the bereaved family’s neighbors, school, and community, showed their concern towards the unfortunate death of Do and Malon.

“The entire community shares in their grief and sadness. Westport is a caring community, and I know we will come together to support those who need to begin the healing process,” Westport First Selectman Jim Marpe said.

children-playing-334531_960_720 A Westport mother named Tracy Do and her 7-year-old daughter were found dead in their mansion due to a shocking murder-suicide. No further details were revealed, however, reports show that Do and her ex-partner, John Malon were involved in a custody battle over their two daughters. This is a representational image. cocoparisienne/Pixabay