Many thousands of them escaped from North to South as a result of the North Korean famine of 1990s .
As of 2006 , the Ministry of Unification registered about 9,000 North Koreans in South Korea .
Many thousands of them escaped from North Koreans to South Korea as a result of the North Koreans   famine of 1990s .
As of 2006 , the Ministry of Unification registered about 9,000 North Koreans in South Korea .