Special police
On 6 November 1999, police arrested two teachers in Sodo for objecting to the use of a new language in school textbooks. Student demonstrations against the arrests led to widespread week-long protests and riots. Special police units were brought in to suppress the demonstrations, and killed as many as 10 people, injured hundreds and arrested up to 1,000 others. A former YMCA camp outside Sodo was used as a temporary detention facility for hundreds of demonstrators.