London, Aug 4 : Michael Jackson's mother Katherine has said she does not believe her son died of natural causes.

The 79-year-old broke her silence as she was granted permanent custody of his three children, reports The Mirror.

In an emotional interview with US talk show host Geraldo Rivera, she said: "All I know is my son is dead - and I don't think he died of natural causes or whatever.

"He's too young to have that. Something happened. I don't know what it was. And I can't say."

Meanwhile, Katherine was recently granted full custody of Prince Michael, 12, Paris, 11, and seven-year-old Prince Michael II, a. k. a Blanket after reaching an out-of-court deal with the Jackson's former wife Debbie Rowe, the mother of the singer's two eldest kids. (ANI)