The family of Coretta Scott King confirmed her death Tuesday morning at the age of 78. The widow of Dr. Martin Luther King, Jr., had suffered a serious stroke and heart attack last year.
Flags at the King Center in Atlanta have been lowered to half-staff. In a statement, the family says, "We appreciate the prayers and condolences from people across the country." The statement says she died overnight.
The Santa Monica Health Institute Clinic in Rosarito Beach, Mexico, where King died was known for providing alternative treatments to patients with incurable diseases.
Bishop T.D. Jakes of The Potter's House church in Dallas said he helped King get to Mexico, but he didn't know what kind of treatment she was seeking.
Her daughters Bernice and Yolanda were at the Mexican hospital. Mexican authorities also told the family there's legal requirement that King's body be embalmed before being returned to the U.S.
Following her husband's assassination in 1968, King devoted her life to ensuring that his own legacy of human rights and equality lived on.
Former Atlanta Mayor Andrew Young, who's close to the family, told NBC that King's daughter Bernice went in to wake her up last night but was unable to do so. He said, "Her spirit will remain with us just as her husband's has."
Poet Maya Angelou told ABC it's both a "bleak" morning and a "great" one, great because "we have a chance to look at her and see what she did and who she was."
Mrs. King was a native of Perry County, Ala.