Ananova:

The FBI is investigating a private charter jet company after it allegedly filmed Michael Jackson and his lawyer as the singer flew to California last week to be arrested.

Mark Geragos says he has won a temporary restraining order against XtraJet, barring any release of the tapes.

He claims the charter company covertly installed two cameras in the cabin of the plane.

The cameras "were recording attorney-client conversations and then somebody had the unmitigated gall to shop those tapes around to media outlets in order to sell them to the highest bidder," he said.

Separately, FBI spokesman Matthew McLaughlin said agents have gone to the headquarters of XtraJet.

"We're currently assessing if a federal violation has occurred," Mr McLaughlin said.

The tapes' existence came to light when representatives of XtraJet showed it to several news organisations, saying they had found two videotapes aboard one of their jets and wanted to know whether it was legal to distribute or sell them.

Mr Geragos said he contacted XtraJet and was referred to a lawyer who told him: "We had a lottery ticket and we thought we were going to do something with it."

"This is not the lottery," Mr Geragos said. "This is this man's life. This is his family's life. These are scurrilous accusations."

Fox Network viewed the tape on Monday and reported that Jackson looked "calm, often smiling or laughing" during the flight. The lawsuit claims XtraJet asked Fox to pay a price "in the high six figures."