On 27 December 1979, about 700 Soviet troops took over major government and military buildings at Kabul. The troops wore uniforms similar to the army of Afghanistan. At 7:00 pm, the Soviet troops destroyed Kabul's communication. This stopped all communication among Afghan troops. At 7:15 pm, Soviet troops entered Tajbeg Palace. By morning of 28 December, the first part of the military action was over. Amin and his two sons were killed in the fighting by this time. The Soviets announced freedom of Afghanistan from the rule of President Amin. They also said that all the Soviet soldiers were there to fulfill their duty as stated in the "Treaty of Friendship, Cooperation and Good Neighborliness of 1978."