Silver Bull Resources announced the drill results for the fourth of five batches of drill holes from the underground drill program twinning a series of "long holes" in the high grade zinc zone situated below and adjacent to the high grade silver zone, located at the eastern end of the Shallow Silver Zone on the Sierra Mojada Project in Coahuila, Northern Mexico. The underground drill program at Sierra Mojada utilized two underground "Termite" drill rigs to twin a historical long hole data set with diamond core along a high grade silver zone and an underlying and adjacent high grade zinc zone, both with a presently defined strike of 1.5km and located at the eastern end of the Shallow Silver Zone. The purpose of the program is to increase confidence in the long hole data set which represents approximately 38,000 meters of drilling that was either severally restricted or discarded in Silver Bull's last NI 43-101 resource report on the project dated July 5, 2012. The twinning drill program concluded in mid-December 2012 and the company is awaiting final assay results from the lab at ALS Chemex in North Vancouver, Canada. Complete results from the 2012 twinning program will be incorporated in an updated NI 43-101 resource estimate on the Shallow Silver Zone and Zinc Zone, scheduled for release in Q1.