SMT-Bolivar-Extention-of-Bolivar-NW-orebody-Final-(1)

Toronto, ON – June 6, 2018 – Sierra Metals Inc. (TSX: SMT) (BVL: SMT) (NYSE
AMERICAN: SMTS) (“Sierra Metals” or “the Company”) today announces results of an infill drilling program evaluating the continuity and characteristics of geophysical anomalies that were previously tested as part of a recent Titan 24 Geophysical Survey and deemed high value targets at the Bolivar Property, Chihuahua, Mexico. The Bolivar Property is situated within the Piedras Verdes Mining District, which is located within the major north-northwest trending Sierra Madre Precious Metals Belt extending across the states of Chihuahua, Durango and Sonora in northwestern Mexico.