Los Angeles, Oct. 3 -- Reality TV stars Kim Kardashian and her mother, Kris Jenner, have filed a defamation case against singer-songwriter Ray J after he suggested that the two were involved in an illegal criminal enterprise.

According to Variety, the lawsuit has been filed in the Los Angeles Superior Court, a week after the singer, whose real name is Ray Norwood Jr., shared a livestream where he spoke about working with prosecutors on a RICO case.

"The federal RICO I'm about to drop on Kris and Kim is about to be crazy, and the feds are coming," he said as quoted by the outlet.

In a strong-worded response, the lawsuit called the remarks false and added, "No such federal investigation exists... Ray J's conduct represents an egregious a...