June 27 (Reuters) - Sierra Metals Inc SMT.TO :
* SIERRA METALS RECEIVES PERMITS FOR ADDITIONAL SURFACE EXPLORATION DRILLING AND TAILING DAM EXPANSION AT ITS YAURICOCHA MINE
* SIERRA METALS INC - RECEIVED PERMIT TO CONSTRUCT EXPANSION OF TAILING DAM FACILITY, PERMIT FOR SURFACE DRILLING PROGRAM AT YAURICOCHA MINE