BEIJING, April 23 (Xinhuanet) -- Alec Baldwin's attorney filed court papers Friday in Los Angeles County demanding website TMZ reveal the source of an angry voice-mail message in which the actor berated his 11-year-old daughter, and Baldwin has also issued an apology for his outburst to his fans on his website.

    The filed document is an Order to Show Cause on why former his wife Kim Basinger and her lawyers should not be held in contempt.

    In a declaration filed by Baldwin's lawyer, Vicki Greene, the attorney says petitioner [Basinger] is the only parent with custody, possession and control of the minor child's telephone voice-mail message that was dissemination (sic) to Harvey Levin and TMZ.com.

    "I do not know how Mr. Levin received any information about the court proceeding that was closed to the public, but again, it had to come from someone connected to the proceeding, and it was not me," Green states. "If Mr. Levin had a tape recorded message between Respondent and the minor child, it had to have originated from Petititoner or her employees, agents or attorneys."  

    Greene's statement said: Respondent [Baldwin] urges the Court to set a heariing to determine the source of the leak and whether and how its Orders have been violated. Information has been leaked to the press intentionally. The specific source is unknown, but it could only have come from Petitioner's side of the case.

    Greene ends by alleging the leak "goes against the Court" stated desire to protect the child from unwarranted publicity.

    Baldwins apology said, in part: "Although I have been told by numerous people not to worry too much, as all parents lose their patience with their kids, I am most saddened that this was released to the media because of what it does to a child," he wrote.

    "I'm sorry, as everyone who knows me is aware, for losing my temper with my child. I have been driven to the edge by parental alienation for many years now. You have to go through this to understand. (Although I hope you never do.) I am sorry for what happened. But I am equally sorry that a court order was violated, which had deliberately been put under seal in this case."

    TMZ has stated on their website they do not divulge sources.

    (Agencies)