Aug 14 - Riot police backed by helicopters and armored vehicles firing tear gas storm Yonsei to break up the festival attended by about 2,000 students. Students shelter at a classroom complex and a science block. Police ring the campus. 16 - Police raid the campus again to try to arrest about 3,600 students continuing violent protests. They pull back after failing to seize the students.
Some students sneak off the campus into surrounding hills.
Aug 17 - More than 10,000 riot police storm the university for the fourth straight day and mass around the two buildings. More than 2,000 students hole up inside. 18 - Police step up pressure on students by stopping parents from delivering food and medicine. Police seek to cut power supply to the buildings but the university refuses permission because a blackout could spoil costly projects under way in scie nce block laboratories. Aug 19 - Weary students begin fainting and ambulances rush about a dozen of them, some unconscious, to hospital.