MARION, Va. -

Investigators have ruled that the fire at a Marion apartment complex that led to the death of a 2-year-old was accidental.

Investigation also revealed that the fire started inside the second unit apartment where Elizabeth LeSueur lived with her family.

The fire took place around 10:00 a.m. Tuesday. Elizabeth LeSueur, her mother, Sandra LaSueur, and her 3-year-old son Jacob Mardis were able to escape. Elizabeth's 2-year-old daughter, Abigail Mardis, was killed in the apartment fire.

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Investigators are still working to determine what caused a fire at an apartment complex in Marion that led to the death of a 2-year-old girl Tuesday.

Two-year-old Abigail Mardis died in the fire. The Town of Marion Police and Fire departments were notified of a fire inside a second floor apartment at Country Club Crossing Apartments at 10:23 a.m. Elizabeth LeSueur, her son, Jacob Mardis, 3, and grandmother Sandra LeSueur were able to escape.

Elizabeth LeSueur was taken to Johnson City Medical Center for treatment for serious injuries and burns. Sandra LeSueur was taken to Smyth County Community Hospital for treatment of serious injuries, and Jacob Mardis was treated at and released from Marion Medical Center.

Abigail Mardis' body was taken to the Office of the Medical Examiner in Roanoke for examination and autopsy, according to a news release.

Four area volunteer fire departments responded to the fire, including the Town of Marion, Adwolfe, Chilhowie and Atkins.

The cause and origin of the fire are under investigation by the Virginia State Police Bureau of Criminal Investigation's Wytheville Field Office and the Town of Marion Police and Smyth County Sheriff's Office.

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Investigations continue into a fire at an apartment complex in Marion that led to the death of a 2-year-old Tuesday.

At 10:23 a.m. Tuesday, the Town of Marion Police and Fire departments were notified of a fire on the second floor of the Country Club Crossing Apartments.

A mother, grandmother, and 3-year-old son were able to escape the burning apartment. The 2-year-old daughter was killed in the fire.

The mother was taken to Johnson City Medical Center for treatment of serious injuries and burns, and the grandmother was treated for serious injuries at Marion Medical Center. The 3-year-old son was treated at and released from Marion Medical Center.

The 2-year-old daughter's body was taken to the Office of the Medical Examiner in Roanoke for examination and autopsy.

The Town of Marion, Adwolfe, Chilhowie and Atkins volunteer departments responded to the fire.

Investigators are still working to determine what started the fire.

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A 2-year-old was killed Tuesday in a fire at an apartment complex in Marion.

The fire broke out around 10:23 a.m. at the Country Club Crossings apartments.

One other person was flown to Johnson City Medical Center.

It's not clear yet what started the fire.

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The Marion fire department is working a multiple structure fire at an apartment complex.