Yonhap wrote this yesterday:

Police brutality under spotlight after farmer's death

Police brutality at a demonstration against further opening of the South Korean rice market caused the death of a farmer from cerebral hemorrhaging Thursday, an emergency committee established by 59 civic organizations claimed Sunday.

Jeon Yong-cheol, 44, collapsed in front of his house a day after attending the demonstration on Nov. 15. He underwent two brain operations on Nov. 18, but died six days later.

11.15: Riot cops' attack on Yeouido against the farmers demonstration

Here:

http://www.voiceofpeople.org/new/2005112733315.html
and in the following articles you can read about it in Korean.

Before yesterday (11.26) a rally in Seoul, near Gwanghwamun, took place to protest against this. About 300 (still I'm waiting for the confirmation) people participated.