Copper miners gain as red metal hits two-month high on supply worries

U.S.-listed shares of copper miners gain premarket, tracking red metal's prices

Benchmark three-month copper CMCU3 on London Metal Exchange up 1.5% at $9,761 per metric ton, strongest since April 1

Copper prices rise amid dwindling inventories in London Metal Exchange warehouses and supply worries after big mine in Congo suspended

Shares of global mining companies Rio Tinto RIO.N and BHP Group BHP.N gain 1.5% and 1.9%, respectively

Southern Copper SCCO.N rises ~1% and Freeport-McMoRan FCX.N up 1.8%

Canadian miners Hudbay Minerals HBM.N and Ero Copper ERO.N gain 2% and 2.2%, respectively