president el-sisi is trying to change that. egypt, which historically has had close ties with the sudanese army, did not invite sudan's warring factions to the summit. >> what is known as the current government has lost control of the situation in sudan. they have lost the trust of their neighboring countries, or you could even say of countries across the region. reporter: the conflict has led to a major humanitarian crisis. within three months, more than three million people in sudan have been displaced. about 700,000 of them have gone to neighboring countries, many of which were already struggling with their own economic and political issues. >> my country, chad, is suffering due to the consequences of what is happening in sudan. within one week we received more than 150,000 refugees, most of them women and children. reporter: the fighting, which started in the capital khartoum, has now spread westward to the already devastated darfur region. the united nations says the bodies of at least 87 people were found in a mass grave