Police say Dominic Newton, 37, better known by his stage name "The Jacka," was shot in the head near MacArthur Boulevard and 94th Avenue around 8 p.m. Monday.
Officers say he was taken to the hospital, where he died.
Newton was living in Pittsburg.
No arrests have been made.
Meanwhile, fans have been gathering in Oakland to pay their tribute.
Mourners of the @theJacka put his cd's amid candles and play his music at memorial to 37 yr old rapper. pic.twitter.com/tuCdqFLeKW
— Laura Anthony (@LauraAnthony7) February 3, 2015
Fans of Bay Area rapper @theJacka gather at 94th and MacArthur where he was shot and killed last night. pic.twitter.com/ObeGVEdxgX
— Laura Anthony (@LauraAnthony7) February 3, 2015
Many are also offering their condolences on social media.
We lost a Bay Area legend R.I.P @theJacka 🙏
— E40 The Game Spitter (@E40) February 3, 2015
Rapper @theJacka has been killed in a shooting in East Oakland, CA http://t.co/nBe24sb88x
— billboard (@billboard) February 3, 2015
The Jacka was active in the Bay Area rap scene since 1999, when he released his first album with the group Mob Figaz. The group sold 160,000 copies of the album.
He self-published a solo album in 2001 and released more than a dozen albums and mixtapes since. Throughout his career, he has collaborated with numerous influential Bay Area artists, including E-40, Andre Nickatina,
Yukmouth, Messy Marv and Keak Da Sneak.