Just days after becoming the world's oldest person, 115-year-old Dina Manfredini has died at a retirement home in Iowa.

Manfredini's youngest granddaughter, Lori Logli, told CNN she understood her that her grandmother died in her sleep during the night.

Guinness World Records had declared Manfredini the world's oldest person just days ago.

On December 4, Besse Cooper, age 116, died at a Georgia assisted-living center.