On 11 March 1990, the Supreme Council of the Lithuanian SSR announced its secession from the Soviet Union and intention to restore an independent Republic of Lithuania. As a result of these declarations, on 9 January 1991, the Soviet Union sent in troops. This culminated in the 13 January attack on the State Radio and Television Building and the Vilnius TV Tower, killing at least fourteen civilians and seriously injuring 700 more. The Soviet Union finally recognised Lithuanian independence in September 1991. The Constitution, as did the earlier Lithuanian Constitution of 1922, mentions that "the capital of the State of Lithuania shall be the city of Vilnius, the long-standing historical capital of Lithuania".