Sierra Metals Inc. is pleased to announce a new silver resource estimate on its Cusihuiriachic Property (Cusi), Chihuahua State, Mexico. These resources are in two areas of the Cusi mine currently in commercial production, Promontorio and Santa Eduwiges, as well as in two prospective areas, La India and San Juan, where the company is doing underground development. This resource estimate was prepared by Gustavson Associates, LLC (“Gustavson”) of Lakewood, Colorado.

Southern Silver Exploration Corp. reported today that its wholly owned subsidiary, Minera Plata del Sur, S.A. de C.V., under the direction of Freeport-McMoRan Exploration Corporation, has completed an initial eight core hole, 3445 metre drill program on the company’s Cerro Las Minitas project located in Durango, Mexico. Freeport-McMoRan Exploration Corporation holds a right to acquire up to a 70% indirect interest in the project.

Excalibur Resources Ltd. is pleased to report the results of two mineralogical studies on stockpiled ore samples collected on the Company’s Catanava property in Pinos, Zacatecas State, Mexico. The studies were completed by Terra Mineralogical Services Inc., the purpose of which is to better understand the ore characteristics and to provide some expected gold and silver recovery estimates. The results of the study indicate that the gold and silver recoveries will be maximized through a combination of a moderate fine primary grind and flotation. The assay results from SGS Lakefield are shown in the following table.