South Korea\'s top nuclear envoy Lim Sung-nam held talks in Vienna with the new US envoy on North Korea and discussed efforts to reopen the stalled six-nation talks on the North\'\'s nuclear weapons programs, a Seoul official said Tuesday. Lim met with Glyn Davies on Monday during his two-day trip to Vienna and exchanged views on the outcome of a Pyongyang-Washington meeting held in Geneva last month, the foreign ministry official said. North Korea and the US concluded their bilateral meeting in Geneva last month aimed at restarting the stalled six-party talks. Both sides reported some progress after the Geneva meeting, but no agreement was reached to resume the broader negotiations involving the two Koreas, the US, China, Russia and Japan. Following the visit to Vienna, Lim will fly to the Indonesian resort island of Bali as South Korea is seeking to hold trilateral talks with the US and Japan to coordinate their joint strategy on the North Korean nuclear standoff on the sidelines of the 18-nation East Asia Summit later this week, the official said, according to South Korea\'\'s News Agency (Yonhap).The six-party talks have been dormant since April 2009, when the North left the negotiating table and then conducted its second nuclear test a month later. Seoul and Washington said Pyongyang must first take concrete steps to show its sincerity before reconvening the talks, such as a monitored shutdown of its uranium enrichment plant. Pyongyang insists, however, that the talks should be resumed without any preconditions.