Friday's incident occurred two weeks before the G-20 summit in Seoul. The G-20 includes industrialized nations and developing economies, which focus on economic issues and economic policy coordination.
Authorities said a total of 50,000 police and riot police will be deployed during the summit on November 11 and 12, according to Yonhap.
http://edition.cnn.com/2010/WORLD/as...ent/index.html
Note:October 29, 2010 -- Updated 1402 GMT (2202 HKT)