About the shelling, which of the following statements is CORRECT?

News Item 3
    The United Nations Secretary General Ban Ki-moon has joined South Korea and several major powers in a strong condemnation of North Korea’s shelling of a South Korean island, (9) which killed several soldiers and injured dozens of people. South Korea’s President Lee Myung-bak ordered the army to retaliate with missile strikes in the event of further North Korean attacks. The US State Department described the shelling as a stunning provocation.
    Ban Ki-moon said the artillery attack was one of the gravest incidents since the Korean War ended in 1953. He condemned it and called for immediate restraint. No country has formally requested an emergency session, and the UN will wait to hear what South Korea might want from such a meeting. (10) But North Korea’s deputy ambassador said this was something that should be discussed by the two Koreas and not by the Security Council.