Oksana Grigorieva’s ex bodyguard sides with Mel Gibson

London: Oksana Grigorieva’s former bodyguard has claimed that the singer secretly taped phone calls with Mel Gibson with the purpose of extortion.

The ex-minder has said that Grigorieva wanted to "pressure" the star into handing over a financial settlement, reports the Daily Express.

Grigorieva and Gibson split last year (10) and are currently locked in a bitter custody battle over baby daughter Lucia.

The break-up turned nasty when Grigorieva accused the actor of domestic violence, and captured him on tape allegedly confessing to striking her.

And now former security guard Kristian Herzog has told TMZ.com that Grigorieva wanted "to pressure Mel to pay her money" and suggested she plotted the extortion early on, branding her a "sexual sorceress".

He has also defended Gibson against allegations he punched his ex - he claimed Grigorieva told him all about the violent incident and admitted that the actor had only slapped her.