People Staff
May 14, 2010 07:20 PM

YouTube videos of Michael Jackson’s children Paris and Blanket and their cousins were accessed by a hacker and the matter is under “legal investigation,” a family member tells PEOPLE.

Alejandra Jackson, the ex-wife of Jermaine Jackson and mother of Jermajesty, Jaafar, Donte, Genevieve and Randy, Jr., says she was dismayed when the videos, which also show her children, hit the Internet.

“The recent release of personal videos of my children and the other grandchildren has been a terrible invasion of our family privacy,” she says. “My home computer was hacked into by an unknown source and this is currently under legal investigation.”

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Alejandra’s family lives at the Jackson family estate in Encino, Calif., with Michael’s children and family matriarch Katherine. The videos, released anonymously over the past few months – most recently on Thursday – at times show the Jackson cousins at seemingly violent play, something Alejandra disputes.

“The people who have unlawfully released this material are trying to portray my kids as bad children,” she says. “They are not. In these videos, they are simply playing and pretending, like all kids do. My children and I feel horrible about this and sincerely hope the hackers will be stopped.”

June 25 will mark the one-year anniversary of Michael Jackson’s death.

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