Videos posted online show thousands in school uniforms, schoolbags on their backs, marching Tuesday in the streets of Khartoum and in other places, denouncing student deaths the previous day in North Kordofan province, AP reported.
Security forces fired live ammunition on Monday in the North Kordofan city of Obeid to disperse student protests. At least five people were killed, including four students.
The Sudanese Professionals Association called for the marches on Tuesday. The group has been part of months of protests leading up to the military's overthrow of President Omar al-Bashir in April.
Since the military took over Sudan, the association has demanded a swift transition to civilian rule.