Excellon Resources Inc. provided an update of the Mineral Resource Estimate for the Platosa Mine and a summary of the Company's consolidated mineral resources across all of its projects. Mineral resources at Platosa are estimated based on drilling up to February 28, 2021. The Company is currently continuing its expansion and infill drilling program from dedicated underground infrastructure with results from this program to be included in subsequent resource updates. This program has been progressing well since Third Quarter 2020 after facing challenges in 2019 and 2020 due to management changes, accessibility of drilling platforms and COVID-19 (in H1 2020). Since the last resource update as at March 31, 2018, 187 exploration holes from surface and underground have been completed totaling approximately 21,400 meters. The mineral resource estimation update included a geological modeling audit, grade estimation, sensitivity analyses, and mineral resource classification and was completed by Joycelyn Smith, PGeo (APGO#2963), under the supervision of Mr. Glen Cole, PGeo (APGO#1416), an appropriate independent Qualified Person as this term is defined in National Instrument 43-101. The overall process was reviewed by Dr. Oy Leuangthong, PEng (PEO#90563867). The effective date of the Mineral Resource Statement is March 31, 2021. The Platosa mineral resource model update will be supported by a technical report prepared by SRK Consulting (Canada) Inc. ("SRK"), which will be available on SEDAR within 45 days of this news release. During 2020, the Company significantly increased consolidated Mineral Resources through the generation of an updated Mineral Resource Estimate on the Evolución Project in Zacatecas and the acquisition of the Kilgore and Oakley Projects in Idaho.