HOUSTON, March 6, 2013 /PRNewswire/ -- Willbros Group, Inc. (NYSE: WG) announced today that Willbros will announce Fourth Quarter and Full Year 2012 Results from Continuing Operations before market close today due to an inadvertent partial distribution of its earnings announcement this morning. Due to this event, the New York Stock Exchange has halted Willbros Group stock trading until the full announcement is released during market hours today. Willbros Group, Inc. is an independent contractor serving the oil, gas, power, refining and petrochemical industries, providing engineering, construction, turnaround, maintenance, life-cycle extension services and facilities development and operations services to industry and government entities worldwide. For more information on Willbros, please visit our web site at www.willbros.com. Contact: Mike Collier713-403-8038 SOURCE Willbros Group, Inc.