China says China surveillance ship conducted activities in a `` special economic zone '' U.S. demands U.S. take measures `` to prevent similar acts from happening '' Pentagon says Chinese ships harassed Pentagon Impeccable in international waters . Chinese crew tried to snag Impeccable 's equipment in water , USNS says .
China says U.S. surveillance ship conducted activities in a `` special economic zone '' China demands U.S. take measures `` to prevent similar acts from happening '' Pentagon says Chinese ships harassed USNS Impeccable in international waters . Chinese crew tried to snag Impeccable 's equipment in water , Pentagon says .