GR Silver Mining Ltd. reported drill results from the Company's recently announced surface and underground core drilling program in the Plomosas Mine Area, as well as validation sampling results from historic drilling at its 100%-owned Plomosas Silver Project ("Plomosas Project") in Sinaloa, Mexico. Two underground drill holes (PLI20-01, PLI20-02) drilled by GR Silver Mining have confirmed attractive new mineralized zones in the footwall and hanging wall of previously mined areas in the Plomosas Mine Area. These areas were previously thought to be barren wall rock zones. The surface drill hole (PLS20-04), also drilled by the Company, has identified the presence of a wide polymetallic (lead-zinc) mineralized zone along strike from recently drilled areas, supporting ongoing surface work to expand shallow resources. In addition, the review has confirmed the presence of massive sulphide (sphalerite-galena) narrow veins in historic workings (PD-121) in the Plomosas Mine Area, presenting a new target for future underground drilling along strike and down dip. The integration of current drilling results with sampling and validation of historic data, has proved to be a valuable tool to support ongoing resource modelling, identifying potential areas to delineate additional underground resources and near surface resources. The drilled area represents a highly prospective mineralized system incorporating multiple mineralization styles. The system is open for expansion along strike and down dip. GR Silver Mining's current underground drilling has identified the presence of high-grade narrow Ag-Au-Pb-Zn hydrothermal breccias, as well as multiple precious and base metal rich veinlets on the hanging wall of the Plomosas Fault. The hanging wall zone has defined a mineralized corridor ranging from 20 m to 50 m thick (Link to Section). The broad geometry of this structural corridor provides opportunity for delineation of high volume, bulk mineable style mineralization as part of the ongoing resource modelling process. The review, sampling and validation of the historical data has also revealed Au-Cu rich zones and narrow massive sphalerite-galena veins in the vicinity of high-grade polymetallic (Au-Cu-Ag-Pb-Zn) sulphide-rich mineralization, which was discovered during initial underground channel sampling on the lower (775m RL) level of the Plomosas Mine. Based on the recent underground and surface drilling results, GR Silver Mining has added another drill rig on site. The Company currently has five drill rigs operating at the Plomosas Project: three at the Plomosas Mine Area and two at the San Juan Area. The initial 4,500 m surface core drilling program, has been increased to 11,900 m, aiming to delineate a much larger initial resource footprint in both areas. The Company has recently completed processing of an aeromagnetic and ground geophysical (IP) survey in both areas, with positive results identifying new anomalies in areas outside of the historic underground workings. The review and validation of historic data is an important component of the upcoming resource modelling, due to its location on the surface and in the underground areas. The Company continues to release this historic information as validation is completed on site.