Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. North Korean Leader's Sister Threatens Military Action Against South Korea William Gallo SEOUL - The sister of North Korean leader Kim Jong Un has issued an ominous military threat toward South Korea, vowing unspecified retaliation over South Korean activists who have floated anti-Pyongyang leaflets into the North. In a cryptic statement late Saturday, Kim Yo Jong vowed her country would "soon take a next action" against South Korea -- a move she suggested would be carried out by the country's military. "By exercising my power authorized by the Supreme Leader, our Party and the state, I gave an instruction to the arms of the department in charge of the affairs with enemy to decisively carry out the next action," Kim said in the state-run Korean Central News Agency. Threat on military pact It was the most direct threat yet during North Korea's recent effort to unilaterally raise tensions with the South. Last week, Pyongyang said it would cut off all official communications channels with Seoul and threatened to scrap an inter-Korean military agreement meant to reduce tensions. Some analysts say North Korea appears to be laying the groundwork for a significant provocation, possibly in an attempt to gain economic or other concessions from South Korea. "If North Korea hopes a new inter-Korean crisis can bring about a rapid and significant change in Seoul's approach -- in a way that could lead to large-scale economic aid to Pyongyang, for example -- it may feel a major escalation of tensions is the only way," tweeted Chad O'Carroll, CEO of Korea Risk Group, which produces the influential NK News website. .