Copper miners slide as red metal heads for worst month since November

Benchmark copper CMCU3 on the London Metal Exchange falls 2.2% to $9,231 a metric ton, as data from top metals consumer China showed the country's factory activity contracted at the fastest pace in 16 months in April

Also adding to pressure was a lack of progress in de-escalation of the U.S.-China trade conflict

U.S. shares of global mining giants Rio Tinto RIO.N and BHP BHP.N fall 2.5% and 2.3%, respectively

Freeport-McMoRan FCX.N drops 4.3% and Southern Copper SCCO.N down 3.3%

Canadian miner Teck Resources TECK.N falls ~3%