In late 1991, dissent was mounting against Gamsakhurdia in Georgia due to his intolerance of critics and attempts to concentrate political power. On 22 December 1991, after a coup d'état, Gamsakhurdia and his supporters were besieged by the opposition, which was backed by the national guard, in several government buildings in Tbilisi. The ensuing heavy fighting resulted in over 200 casualties and left the center of the Georgian capital in ruins. On 6 January, Gamsakhurdia and several of his supporters fled the city for exile. Afterwards, the Georgian military council, an interim government, was formed by a triumvirate of Jaba Ioseliani, Tengiz Kitovani and Tengiz Sigua, and, in March 1992, they invited Eduard Shevardnadze, a former Soviet minister, to come to Georgia to assume control of the Georgian State Council.