South Korea's top diplomat warned North Korea on Saturday that time was running short for the communist nation to make progress in stalled negotiations over its nuclear programs, a news report said. Foreign Minister Yu Myung-hwan said the North should address the stalemate over its requirement to fully declare its nuclear programs quickly because the US government does not have much time to focus on the issue, according to Yonhap news agency. "Looking at the schedule of US domestic politics, (Washington) would virtually take its hands off (the issue) once the vacation season starts in early August," Yu told South Korean reporters in Beijing at the end of his three-day visit there, Yonhap said. "We have to start negotiations anew from scratch if a new administration comes in the United States. Therefore, we have to make progress in the declaration issue so as to prepare momentum" for further negotiations, he said.