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A 25-year-old woman has died in the New Year's Day blowtorch attack in Puerto Rico, becoming the fifth person among the 14 victims to succumb to their injuries.

Kate Donahue, of Seattle, had burns to more than 80 percent of her body when she was flown to to the University of Miami/Jackson Memorial Burn Center in Miami, Florida, said family friend Justin Stein. She died Thursday.

"She passed very peacefully," Stein said. "We were reminiscing about her life. The doctor said she could hear us talking to her."

Donahue had flown with her new fiancee, Jesus Sánchez, to Florida, Puerto Rico, to meet his family. Sánchez's uncle Justino Sánchez Díaz, 45, had invited the couple and a dozen others to the house he shared with his parents for a New Year's dinner, police said.

That's when he allegedly doused them and set them on fire. In addition to Jesus Sánchez and Donahue, three others, including the suspect's elderly mother and niece, were also killed.

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A motive hasn't been determined, in part, because Sánchez Díaz has remained silent about the attack.

Donahue was mourned Thursday by friends and relatives. She was known for her collection of 40 high-heeled, black shoes and her love for dancing, especially salsa. She even dislocated her knee dancing to Michael Jackson's "Beat It," best friend Lisa Spoelstra told the AP.

She was born in California, then moved to Washington and later Arizona before returning to her native state to study nursing, following her mother's footsteps, Spoelstra said.

"We were always looking for good, harmless fun," she said of her friend.

Based on reporting by the Associated Press.

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