LONDON, Dec. 2 - The law firm of Carter-Ruck has sent a letter to several British newspapers warning them not to harass its client, television personality Simon Cowell.

Cowell is a judge on the U. K talent show "The X Factor," as well as on the U. S. singing competition series "American Idol."

The Guardian newspaper said his attorneys issued the warning after a tracking device was allegedly found attached to his car last week. The letter requests the media not chase Cowell, place him under surveillance or photograph him in places where he has a reasonable expectation of privacy.

"We have always played the game and we are not precious, but this is way beyond anything acceptable. So Carter-Ruck has sent a letter out to everybody warning them about this and making clear that it is unacceptable," Cowell's publicist Max Clifford told the newspaper. "Simon has been putting up with this for seven years, with people approaching him at all hours and we know that we have got to have working relationships with the papers, but within acceptable boundaries."

Clifford said the journalist believed to have attached the illegal tracking device to Cowell's ride has been confronted by Cowell's camp.

"We know who he is and we have marked his card and told him to never do anything like that again," Clifford told the Guardian. (UPI)