Khartoum in the North. Among the city's industries are printing, glass manufacturing, food processing, and textiles. Petroleum products are now produced in the far north of Khartoum state, providing fuel and jobs for the city. One of Sudan's largest refineries is located in northern Khartoum. The Souq Al Arabi is Khartoum's largest open air market. The "souq" is spread over several blocks in the center of Khartoum proper just south of the Great Mosque (Mesjid al-Kabir) and the minibus station. It is divided into separate sections, including one focused entirely on gold. Al Qasr Street and Al Jamhoriyah Street are considered
Siege of Khartoum to the north by the Blue Nile and to the west by the White Nile. To defend the river banks, he created a flotilla of gunboats from nine small paddle-wheel steamers, until then used for communication purposes, which were fitted with guns and protected by metal plates. In the southern part of the town, which faced the open desert, he prepared an elaborate system of trenches, makeshift Fougasse-type land mines, and wire entanglements. Also, the surrounding country was controlled by the Shagia tribe, which was hostile to the Mahdi. By early April 1884, the tribes north of Khartoum rose in