*Mel Gibson’s camp has yet to comment on the two-minute audio clip that hit cyberspace over the weekend in which he is allegedly heard hurling racial and sexist slurs at his ex-girlfriend.

It hasn’t been verified that the voice is in fact Gibson’s, but apparently it was close enough for his talent agency William Morris Endeavor to drop him shortly after the clip was posted Friday on RadarOnline.com. And the Web site says there’s more offensive audio where that came from.

For 10 days, the site has posted written transcripts of secret recordings it said Gibson’s former girlfriend, Russian singer Oksana Grigorieva, had made. The snippet released Friday is the first audio of the confrontations that have been aired. [Listen below.]

The clip includes segments in which a voice that sounds distinctly like the Academy Award winner is heard telling Grigorieva that she is dressing “like a whore” and that it would be her fault if she were “raped by a pack of n**gers.”

David Perel, RadarOnline’s founder and executive vice president, told The Associated Press that the site had heard “a substantial portion” of 30 minutes of recordings Grigorieva had made. Perel said more audio clips will likely be released in coming days.

The site reported the 40-year-old made the recordings because she was afraid Gibson might harm her.

The Los Angeles County Sheriff’s Department is investigating allegations that Gibson was involved in a domestic violence incident with Grigorieva, with whom he has an 8-month-old daughter. That inquiry is expected to take several weeks before it reaches prosecutors, who will decide whether to press charges.

Perel said RadarOnline has verified it is Gibson on the recording. The site, owned by American Media Inc., which also owns the National Enquirer, did not say how it obtained the tapes. Perel told the AP the site did not pay for the recordings and that they did not come from Grigorieva.