(CNN) A 16-year-old Florida girl who was badly burned in a 2017 New Year's Eve bonfire accident has died, according to her mother.

Layne Chesney was 14 years old and a star softball player when the accident happened in Fort Pierce.

Layne's mother, Leigh Ann Wirz Chesney, told CNN that Layne died Friday morning.

A few days after the accident, Layne's mother told CNN affiliate WFOR , that her daughter and friends were roasting marshmallows that night at a friend's backyard.

"When the flames went out, one of the children or her -- I'm not sure of the story -- accidentally or purposefully put more gas onto the fire to make it higher," Leigh Chesney said. "An explosion occurred. She was engulfed in flames."

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