US celebrity website TMZ, which first broke the news of Jackson's death last week, has now come out claiming that Jackson was not sperm donor of either of his three children.

"Michael Jackson was not the biological father of any of his children. And Debbie Rowe is not the biological mother of the two kids she bore for Michael. All three children were conceived in vitro, outside the womb," the website claimed quoting multiple sources close to the pop star.

"Michael was not the sperm donor for any of his kids. Debbie's eggs were not used. She was merely the surrogate, and paid well for her services in the births of Michael Jr and Paris," the website claimed.

In another sensational revelation, the 'Us' magazine has claimed that Jackson's Australian dermatologist and Rowe's boss, Arnold Klein is the biological father of Jackson's two eldest children - Prince Michael, 12 and Paris Katherine, 11.

"He (Klein) is the dad. He and Debbie signed an agreement saying they would never reveal the truth," an insider told 'Us' magazine.

The identity of the surrogate mother of Jackson's third child, Prince Michael II "Blanket", 7, has never been revealed. The website claims that the surrogate mother of the third child was not informed that the baby was for Jackson.

"The surrogate was never told of the identity of the "receiving parent" - Michael Jackson. Three days after Prince was born at Grossmont Hospital in San Diego County, Jackson's lawyer came to the hospital to pick the baby up and deliver him to Michael," the website said.

Jackson died of a suspected cardiac arrest last week. His 79-year-old mother Katherine Jackson has received the temporary custody of the children and a decision about permanent custody will be made in a hearing scheduled for August 3.