Mel Gibson is just a liar, says ex Oksana Grigorieva

Mel Gibson's ex girlfriend Oksana Grigorieva has broken her silence about the extortion claim, saying that the actor is lying.

The 40-year-old broke her silence when she encountered paparazzi outside her lawyer's office in Century City, California.

She slammed the charges by Gibson's camp of attempted extortion.

"Mel is lying. He's lying. There's no extortion, and there's no texts and no emails. I'm fighting for my child. [Mel's] just a liar, and it will come up in the court, just wait," Usmagazine.com quoted her as saying.

The Los Angeles Sheriff's department has confirmed that it is investigating the extortion charge.