Day: May 28, 2012

Mr. Thomas Skimming, CEO of MacMillan Minerals Inc., is pleased to announce that the Company has commenced a diamond drilling program on the La Raizura Target at the Las Cucharas Gold and Silver Project. Mr. William Hamilton, P. Geo., Manager of Exploration, is a Qualified Person under the meaning of National Instrument 43-101 and is responsible for all technical information contained in this news release.

Excalibur Resources Ltd. is pleased to provide an update on the progress towards production in its 49% subsidiary, Minera Catanava S.A. de C.V. The land use environmental permit received in November 2011 allowed the construction and installation of the plant. The ball mill, jaw and cone crushers and ore bins were installed in December. The conveyors, belts and motors were delivered, installed and tested in January-March and all are operational. In April, 100 tons of dump material was loaded into the raw ore storage bin and 50 tons was crushed to 1/4 inch material into the fine ore hopper that is being batch tested on the three recently installed Action Mining Micron Wave tables. The material is being tested by increasing the size of the batches in order to optimize the flow, the grind and the gold recoveries. Various adjustments have been made including installing feeders for the wave tables and a holding tank.