US and North Korean diplomats on Friday resumed discussions aimed at establishing whether the government in Pyongyang intends to return to the six-party nuclear talks. The North Korean delegation headed by Vice Foreign Minister Kim Kye Gwon arrived at the US Mission to the United Nations in New York for the second day of discussion. His counterpart is the US special envoy for North Korea, Stephen Bosworth, according to a report of the German Press Agency "DPA". US State Department spokesman Mark Toner in Washington described the talks as "exploratory" and "businesslike," but also "constructive." "It's hard to say at this point what conclusions we've reached," he said, but added: "I think we'd describe the discussions as constructive." The six-party talks to resolve North Korea's nuclear programme involve the United States, Russia, China, Japan and North and South Korea, and have been deadlocked since 2008. The North Korean delegation was invited to the US by Secretary of State Hillary Rodham Clinton in an effort to break the stalemate over the nuclear dispute.