evidence: In 1985, the Soviet Union and North Korea signed an agreement establishing a border along the middle of the Tumen.[9] The former Noktundo Island, 32 square kilometres (12 sq mi) in size, was recognized by North Korea as part of Russia. This agreement was not accepted by South Korea, which continues to view Noktundo as Korean territory.[10] [...] - ^ Проблема острова Ноктундо в средствах массовой информации Южной Кореи [The problem of the Noktundo island in the media in South Korea] (in Russian). ru.apircenter.org. Archived from the original on September 10, 2013. Retrieved June 30, 2015.