Three students at Senegal's largest university, the University of Cheikh Anta Diop, set themselves on fire Friday, as protests escalated over the way credits are counted in the geography department, the Associated Press reported. The students survived because friends threw sand on them to put out the fires. The changes in the credit rules have the effect, the students said, of forcing them to spend another year at the university, instead of graduating. Other students are on a hunger strike over the issue.