vladivostok russia russian president vladimir putin say thursday think north korea crisis would escalate large-scale conflict involve nuclear weapons predict common sense would prevail say believe north korea leadership fear freeze nuclear program would follow amount invitation cemetery putin speak economic forum far eastern russian port vladivostok alongside south korean counterpart japanese prime minister previously warn simmer tensions around pyongyang missile program could tip global catastrophe thursday days talk regional leaders officials putin strike optimistic note say russia could see administration u.s. president donald trump want defuse tensions around north korea sure things go far large-scale conflict especially use weapons mass destruction putin tell delegate forum compete side enough common sense understand responsibility solve problem diplomatic mean russia land border north korea less 20 km 12 miles long putin share platform south korean counterpart moon jae-in japanese prime minister shinzo abe spend past days push negotiations call side dial rhetoric unite state want u.n. security council impose oil embargo north korea ban subject leader kim jong un asset freeze travel ban accord draft resolution see reuters wednesday putin give indication thursday whether moscow would back resolution top russian government officials previously condemn idea tighten sanction show little enthusiasm stop modest fuel export pyongyang send home north korean workers instead russia along china advocate freeze freeze plan unite state south korea would stop major military exercise exchange north korea halt weapons program neither side appear will budge far however putin say pyongyang would end nuclear missile program view mean self-defense impossible scare say putin pyongyang offer prospect new sanction freeze weapons program putin say north korea believe wide risk security outweigh potential economic benefit concession tell impose sanction mean live good good tasty food table dress good say putin next step think invitation cemetery never agree putin think north korea crisis go nuclear diplomacy prevail