| GEO World|
| S Korea steps up efforts to haul North Korea to UN|
| Updated at: 0938 PST, Tuesday, June 01, 2010|
SEOUL: South Korea on Tuesday stepped up its campaign to hold North Korea responsible at the UN Security Council for sinking a warship, briefing visiting Russian experts and sending an envoy to the United States.
A team of Russian naval experts arrived on Monday to review the findings of a multinational investigation team, which concluded last month that a North Korean submarine torpedoed the South Korean ship with the loss of 46 lives.
South Korea has announced a series of reprisals including cutting off trade with its communist neighbour.
The South, with US and Japanese support, will ask the Security Council to sanction - or at least to censure - the North for the sinking, one of the worst military attacks since the 1950-53 war.
Seoul needs support from veto-wielding Council members, including Russia and China, which have traditionally been close to Pyongyang.
The foreign ministry in Moscow has said it needs "100 per cent proof" of the North's involvement.