SAN DIEGO (AP) — Rock 'n' roll pioneer Ike Turner's death last month at age 76 was caused by a cocaine overdose, the San Diego County Medical Examiner's office said Wednesday.

"We are listing that he abused cocaine, and that's what resulted in the cocaine toxicity," said Paul Parker, chief investigator at the medical examiner's office.

The medical examiner's office also listed hypertensive cardiovascular disease and pulmonary emphysema as "significant and contributing factors" to Turner's death, Parker said.