Oksana Grigorieva denies leaking raging Mel Gibson tapes

Mel Gibson's ex-girlfriend Oksana Grigorieva has vehemently denied leaking the raging Gibson tapes.

The audio surfaced in July where Gibson can be heard raging against Grigorieva in a series of explosive phone calls.

"I've never leaked those tapes," People magazine quoted Grigorieva as saying.

She says she does not know how the tapes surfaced.

Grigorieva, 40, also denied that she ever attempted to extort any money from Gibson, 54.