The family of the late rapper Tupac Shakur has filed a wrongful death lawsuit in Los Angeles, seeking unspecified damages tied to the artist's murder in 1996.

The suit names former gang leader Duane "Keefe D" Davis, who is currently awaiting trial for his alleged role in the shooting, as the main defendant, alongside additional unnamed co-conspirators.

Davis is the only person ever charged in connection with Tupac's death, after years of investigations. He has pleaded not guilty.

The new lawsuit, reported by several US media outlets, alleges there was a "complex conspiracy" to murder the star, and says its aim is to uncover the identity of the "individuals who were involved" through discovery.

Shakur was one of the most prominent rappers of the early 1990s, selling more than 75 million records, including hit singles Hit 'Em Up and California Love.