Police responded to a reported shooting at about 3:30 p.m. at a home in the 1000 block of 47th Street, where they found Taranda Jones, 18, with a gunshot wound to her upper torso, police said.
Jones was transported from the home she shared with a family member to Highland Hospital, where she was pronounced dead at 4:08 p.m., police said.
Authorities have identified her boyfriend, DeAngelo Eagleton, 18, as a suspect in the slaying and say that he should be considered armed and dangerous.
Police said that Eagleton and Jones had both attended Emery Secondary School but had not reported to school anytime recently.
Eagleton, who is known to frequent Emeryville and Oakland, is a black man with black hair and brown eyes who is about 5 feet 10 inches tall and weighs 175 pounds.
Anyone with information is asked to call police at (510) 596-3700.