NUSA DUA, Indonesia (AFP) - The United States said Sunday it has invited a top North Korean envoy to New York for "exploratory talks" on the possible resumption of the six-party negotiations on denuclearisation. Secretary of State Hillary Clinton said the North's vice foreign minister and former nuclear negotiator, Kim Kye-Gwan, would visit the US "later this week" for the talks - the first such contacts for almost two years. The invitation was announced after envoys from North and SKorea held unexpected talks in Indonesia on Friday, on the sidelines of an Asian security forum which Clinton attended alongside ministers from China and South Korea. "Following the first round of denuclearisation talks between the nuclear negotiators of the Republic of Korea and N Korea, the US has invited North Korean Vice Foreign Minister Kim Kae-gwan to NYork later this week," Clinton said.