London Telegraph 
December 19, 2011
South Korea placed its military on a state of high alert as its government reacted swiftly to news of the death of North Korea’s leader Kim Jong-il.
Lee Myung-bak, South Korea’s president, immediately convened a national security council meeting and placed government officials on emergency response status, banning all leave and travel.
Mr Lee also ordered its military on emergency alert, increased border air patrols and asked its United States ally, which posts 28,500 troops in the south, to step up surveillance via planes and satellites.
All police officers were also called to work on emergency duty while commanders were discussing “a detailed course of action” in response to the death of the North Korean leader.