london north korea big nuclear test date condemn around world sunday several leaders call new sanction u.s. president donald trump say appeasement would work explosion north korea say advance hydrogen bomb come days fire missile japan trump say last week missile launch talk pyongyang answer tweet sunday test show north korea word action continue hostile dangerous unite state u.s. treasury secretary steve mnuchin say would put together new sanction potentially cut north korea global trade german chancellor angela merkel french president emmanuel macron say plan tighten european union sanction late provocation ruler pyongyang reach new dimension german government say statement merkel macron discuss issue phone britain foreign minister boris johnson say north korea seem move close towards hydrogen bomb fit successful missile would unquestionably present new order threat add palatable military solutions british prime minister theresa may say u.n. security council urgently look new measure russia strike cautious tone emerge condition absolutely essential keep cool refrain action could lead escalation tensions russia foreign ministry say add north korea risk serious consequences late sunday russian president vladimir putin meet chinese counterpart xi jinping china agree appropriately deal crisis chinese state news agency xinhua say two leaders agree stick goal denuclearization korean peninsula keep close communication coordination deal new situation xinhua say early china urge north korea stop wrong action say would fully enforce u.n. resolutions country north korea important trade partner position china permanent member u.n. security council closely watch japanese government source say would pressure beijing impose oil embargo probably act eventually ... possible october party convention source say russia real influence north korea china matter trump say north korea become great threat embarrassment china beijing try fail solve problem call south korea talk appeasement would work north koreans understand one thing international atomic energy agency access north korea call nuclear test pyongyang sixth since 2006 extremely regrettable act complete disregard repeat demand international community north korean nuclear test prompt global condemnation