Trisakti University in Grogol, West Jakarta, became the site of a gathering of 10,000 students on 12 May. They had planned on marching south toward the Parliament building, but security forces refused to allow them to leave the campus. The university students conducted a sit-in outside the campus gates, which the police fired shots at and demonstrators responded by throwing rocks at police. In the ensuing chaos, four students were killed. Catalysed by the student deaths, mass violence occurred throughout Jakarta the following day. The Matahari department store in the eastern district of Jatinegara and Yogya Plaza in Klender were barricaded and deliberately torched. It was estimated that at least a thousand people died inside the buildings during the fires. Mobs also attacked Glodok in the northwestern part of the city, where the commercial area of Jakarta's Chinatown was severely damaged. Some store owners reportedly paid local thugs to protect them from the violence because security forces were mostly absent. Riots also occurred near the port of Tanjung Priok in the north, the city of Tangerang to the west, and Kebayoran Baru in the south. Properties owned by Chinese Indonesians were the most common targets. Surakarta (14–15 May) Student protests in Surakarta (also called Solo) began as early as March at the Muhammadiyah University of Surakarta (, UMS) and the Sebelas Maret (11 March) University (, UNS) and grew over the next two months, prompting the police to station officers outside both campuses to prevent them from entering the streets. On 8 May, later known as "Bloody Friday", a clash between UNS students and police forces resulted in hundreds of wounded students. There was also evidence of gunfire as police launched tear gas canisters and fired rubber bullets. UMS students clashed with security forces on 14 May during a protest of the Trisakti shootings in Jakarta. A report of the incident claimed that the violence was provoked by students throwing objects at police from campus grounds. Security forces were unable to disperse the group, and the angered mob of 1,000 moved eastward into the city. A showroom of Timor cars was attacked, much like the violence in Medan earlier in the month. Kostrad (Army Strategic Reserve) forces arrived as the crowd attacked banks and public buildings in the city centre and prevented them from reaching the city hall. From there, they broke up into smaller groups and attacked the surrounding