The Rosen Law Firm announces that it is investigating securities claims against PetroChina Co. Ltd. (NYSE:PTR). On August 27, 2013, shares of PetroChina were temporarily halted following news that three senior officials at China National Petroleum Corporation, parent of PetroChina Co., were under investigation by Chinese authorities in connection with a high-level government probe intended to root out fraud and corruption. The Rosen Law Firm is investigating a potential securities class action lawsuit as a result of this adverse information. If you purchased PetroChina stock on the U.S. markets prior to August 27, 2013, you may visit the website at http://rosenlegal.com to join the prospective class action. You may also contact Phillip Kim, Esq. or Kevin Chan, Esq. of The Rosen Law Firm toll free at 866-767-3653 or via e-mail at email@example.com or firstname.lastname@example.org. The Rosen Law Firm represents investors throughout the globe, concentrating its practice in securities class actions and shareholder derivative litigation. Attorney Advertising. Prior results do not guarantee a similar outcome.