WASHINGTON — The Pentagon said Monday that it plans to participate in new military exercises with South Korea, the first direct military response from the United States to the sinking of a South Korean warship by what officials called a North Korean torpedo.
Pentagon spokesman Bryan Whitman said U.S. forces will participate in an anti-submarine maneuver in "the near future." In a second planned exercise, U.S. units along with South Korea and possibly other regional allies will work to improve their ability to interdict cargo ships carrying arms or other prohibited materials to or from North Korea.
The exercises were announced Monday in Seoul by the South Korean defense ministry, following a nationwide address by President Lee Myung Bak in which he ordered a halt to most trade with the North, and closed all sea lanes between the nations.
Later Monday, U.N. Secretary-General Ban Ki-moon further intensified pressure on North Korea by declaring in New York that "there must be some measures taken" to respond to the North's attack. Ban didn't specify the steps.
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An international investigation has held North Korea responsible for the sinking of the Cheonan, a South Korean naval vessel, on March 26. The apparent attack killed 46 South Korean sailors and represented what South Korean and U.S. officials consider a violation of the armistice between Pyongyang and Seoul that ended hostilities in the Korean War.
A growing international demand for a response is exerting pressure on a reluctant China, North Korea's most important ally, to support consideration of the issue by the U.N. Security Council.
U.S. and South Korean officials are meeting with the Chinese this week to try to persuade them to agree to Security Council deliberations. Secretary of State Hillary Clinton appealed to Chinese officials in Beijing on Monday, but met resistance, officials said.
North Korea has denied it authorized a strike against the South Korean ship. But the upcoming anti-submarine exercise appears aimed at warning Pyongyang against any future attacks. The maritime interdiction exercise, as it is known, will hone efforts to halt weapons shipments.
Approximately 28,000 U.S. troops are stationed in South Korea.