** Shares of Australian copper miners fall, while the broader benchmark .AXJO trades little changed
** Copper prices slip from a three-week peak as renewed Middle East tensions cast doubt on whether the U.S.-Iran ceasefire would hold, reviving concerns over the global growth outlook MET/L
** Canada-based miner Capstone Copper's ASX-listed shares CSC.AX fall as much as 4.2% to A$11.93, post their biggest intraday pct loss since March 27
** Sandfire Resources SFR.AX falls as much as 5.4% to A$17.16, on track for its biggest one-day decline since March 23
** Miner also flags FY26 copper equivalent production to be at lower end of forecast range
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))