LOS ANGELES (Reuters) - Lawyers for Brad Pitt on Thursday threatened legal action against anyone publishing recent photographs they say were taken by paparazzi of the actor and his newly enlarged family at their French estate. Pictures of Pitt and his family in France were "surreptitiously" snapped using a powerful telephoto lens and sold to an unidentified buyer, the Los Angeles lawyers said in a letter published by the U.S. Web site The Smoking Gun (http://www.thesmokinggun.com).