Paris Hilton's brother Conrad is to appear in court in Los Angeles for allegedly disrupting a flight from London.

Conrad Hilton was due before a judge to face allegations that he assaulted and threatened a British Airways flight crew on July 31.

An FBI agent says in papers that Hilton threatened to kill and bury flight attendants and his behaviour was so disruptive that children were crying.

The documents say Hilton was in a rage most of the 10-hour flight and that he was angry over the break-up with a girlfriend and wanted to smoke marijuana.

Flight attendants told investigators Hilton was hurling profanities throughout the flight and said he had been banned from other airlines.

Hilton told FBI agents he had taken a sleeping pill.