The move comes after North Korea on Sunday launched a long-range rocket considered by other countries to be a banned missile technology test. South Korean Unification Minister Hong Yong-pyo said at a news conference that the suspension of operations at the industrial complex in the North Korean border city of Kaesong would stop the North from using hard currency earned there to develop nuclear and missile technology. South Korea's government and companies invested more than 1 trillion won ($852 million) to pave roads and erect buildings in the zone, which lies in a guarded, gated complex on the outskirts of Kaesong, North Korea's third-largest city.