By Jessica Goodman
Updated May 03, 2016 at 12:32 PM EDT
Credit: Annette Brown/Getty Images

Afeni Shakur Davis, mother of rapper Tupac Shakur, died in Marin County, California on Monday night, according to the Marin County Sheriffs Office. She was 69.

Officers responded to a report of possible cardiac arrest at 9:34 p.m. in her home Monday night, the police reported in a series of tweets, and she was transported to a hospital and pronounced dead at 10:28 p.m. A cause of death has not been revealed but the Sheriff’s Coroners Office will lead an investigation.

Shakur Davis was the subject of one of Tupac’s most famous songs, “Dear Mama,” and she took ownership of his estate after his death in 1996, overseeing his posthumous releases. She also founded the Tupac Amaru Shakur Foundation, which helps bring art programs to children.