Intercommunal violence erupted on December 21, 1963, when two Turkish Cypriots were killed at an incident involving the Greek Cypriot police. The violence resulted in the death of 364 Turkish and 174 Greek Cypriots, destruction of 109 Turkish Cypriot or mixed villages and displacement of 25,000-30,000 Turkish Cypriots. The crisis resulted in the end of the Turkish Cypriot involvement in the administration and their claiming that it had lost its legitimacy; the nature of this event is still controversial. In some areas, Greek Cypriots prevented Turkish Cypriots from travelling and entering government buildings, while some Turkish Cypriots willingly withdrew due to the calls of the Turkish Cypriot administration. Turkish Cypriots started living in enclaves; the republic's structure was changed unilaterally by Makarios and Nicosia was divided by the Green Line, with the deployment of UNFICYP troops.