NASHVILLE — Hip-hop producer Tay Keith died from an accidental overdose involving ketamine and mitragynine, the active ingredient in kratom, the Nashville medical examiner's office has ruled, according to TMZ.

The Grammy-nominated producer, known for work with Drake and other major hip-hop artists, was found dead inside his Nashville apartment in June. The medical examiner's report also noted nicotine and ethanol in his system, along with mild coronary artery disease. It remains unclear whether Keith knowingly used kratom, a substance that is federally legal, or was exposed to it another way.