one North Koreans were found in a boat that floated into South Korean waters earlier this week in the Yellow Sea, the largest such arrival in nine months, an official said Saturday. The arrivals were being questioned, and it wasn't yet clear how or why the North Koreans arrived in South Korean waters. The South's long-standing policy has been to allow in North Koreans who choose to defect and repatriate those who wish to return, but defections are a sore point in Korean relations. The boat was found off the northwestern island of Socheong and was handed over to the navy, a South Korean coast guard official in the port city of Incheon said. The official couldn't provide more details because authorities were still questioning the North Koreans. He declined to be identified because he wasn't allowed to speak to the media until a public announcement was made. South Korea's National Intelligence Service declined to comment, and neither Unification Ministry nor Joint Chiefs of Staff officials answered phone calls Saturday. The arrival was the largest of its kind since February, when 31 North Koreans floated south on a boat in the Yellow Sea. Seoul repatriated 27 and let the others stay.