timika indonesia u.s. miner freeport-mcmoran inc evacuate spouses children workers giant indonesian copper mine string shoot area raise security concern move follow efforts indonesian authorities friday evacuate villages near freeport grasberg mine eastern province papua authorities say occupy arm separatists since august least 12 people injure two police officer kill gunmen suspect link separatist rebel freeport ask family household members employees prepare weekend temporary relocation mine town tembagapura 10 km 6.2 miles grasberg company source say workers ask stay behind maintain work schedule say detail evacuation number people impact immediately clear shots fire light vehicle two large mine truck set fire grasberg saturday one source say source decline name authorize talk media freeport statement saturday confirm evacuation plan say carry immediately work closely government law enforcement ensure safety people communities support bring return peace stability soon possible say grasberg world second-largest copper mine volume separatist west papua national liberation army tpn-opm say war indonesian authorities want destroy freeport effort gain sovereignty region tpn-opm claim responsibility shoot deny police allegations take civilian hostages freeport evacuate indonesian mine worker families shoot