Khartoum society, while others settled in large slums at the outskirts of the city. Since the mid-1980s, large numbers of refugees from South Sudan and Darfur fleeing the violence of the Second Sudanese Civil War and Darfur conflict have settled around Khartoum. In 1991, Osama bin Laden purchased a house in the affluent al-Riyadh neighborhood of the city and another in Soba. He lived there until 1996, when he was banished from the country. Following the 1998 U.S. embassy bombings, the United States accused bin Laden's al-Qaeda group and, on 20 August, launched cruise missile attacks on the al-Shifa pharmaceutical factory
Siege of Khartoum stores dwindled and starvation began to set in for both the garrison and the civilian population. Communication was kept through couriers while Gordon also kept in contact with the Mahdi, who rejected his offers of peace and to lift the siege. On 16 September an expedition sent from Khartoum to Sennar was defeated by the Mahdists, which resulted in the death of over 800 garrison troops at Al Aylafuh. By the end of the month, the Mahdi moved the bulk of his army to Khartoum, more than doubling the number already besieging it. As of 10 September 1884, the civilian