Blackstone pursuing RCS owner for up to $600 million over HQ sale - source

MILAN (Reuters) - Blackstone Group is seeking up to $600 million (460.55 million pounds) in damages from the chairman and controlling shareholder of Italian publisher RCS Mediagroup over a disputed property sale, a source close to the fund said on Thursday.In a lawsuit filed in New York on April 22, which was seen by Reuters, the U.S. private equity firm is suing RCS Chairman Urbano Cairo over the issue. The move comes on top of a lawsuit filed by Blackstone against RCS last November which was..