The musicians and Nate Dogg, Kurupt, and Warren G are being sued by two little-known rappers, who allege the hook to Snoop Dogg's 1993 song was written by them for their song, which was also titled Ain't No Fun and featured on their 1991 self-produced album.

According to TMZ.com, the rappers played the songs for Suge, Snoop, Dr. Dre and Kurupt and agreed to turn it over to them in exchange for a recording contract with Knight. However, the deal never came to fruition and they claim the song was later recorded by Snoop Dogg without their permission.

The rappers also claim Suge admitted he took the song from the rap duo in a 2013 Rolling Stone interview.

They are seeking unspecified damages and lost profits.

The new lawsuit is the latest in a long line of legal headaches for Suge, who is behind bars awaiting trial on charges of murder, attempted murder and hit-and-run following a dispute in Compton, California in January, 2015, when he struck and killed his friend Terry Carter and injured actor Cle Sloan with his truck while allegedly attempting to flee a fight.