On 18 May 2005, Estonia signed a border treaty with the Russian Federation in Moscow. The treaty was ratified by the Riigikogu on 20 June 2005. However, in the end of June the Russian Ministry of Foreign Affairs informed that it did not intend to become a party to the border treaty and did not consider itself bound by the circumstances concerning the object and the purposes of the treaty because the Riigikogu had attached a preambule to the ratification act that referenced earlier documents that mentioned the Soviet occupation and the uninterrupted legal continuity of the Republic of Estonia during the Soviet period. The issue remains unsolved and is the focus of European-level discussions.