Then, in a series of stunning victories, UNITA regained control over Caxito, Huambo, M'banza Kongo, Ndalatando, and Uíge, provincial capitals it had not held since 1976, and moved against Kuito, Luena, and Malange. Although the U.S. and South African governments had stopped aiding UNITA, supplies continued to come from Mobutu in Zaire. UNITA tried to wrest control of Cabinda from the MPLA in January 1993. Edward DeJarnette, Head of the U.S. Liaison Office in Angola for the Clinton Administration, warned Savimbi that, if UNITA hindered or halted Cabinda's production, the U.S. would end its support for UNITA. On 9 January, UNITA began a 55-day battle over Huambo, the "War of the Cities". Hundreds of thousands fled and 10,000 were killed before UNITA gained control on 7 March. The government engaged in an ethnic cleansing of Bakongo, and, to a lesser extent Ovimbundu, in multiple cities, most notably Luanda, on 22 January in the Bloody Friday massacre. UNITA and government representatives met five days later in Ethiopia, but negotiations failed to restore the peace. The United Nations Security Council sanctioned UNITA through Resolution 864 on 15 September 1993, prohibiting the sale of weapons or fuel to UNITA.