By Barbara Starr
The U.S. Navy is moving a warship and a sea-based radar platform closer to the North Korean coast in order to monitor that country's military moves, including possible new missile launches, a Defense Department official said Monday.
The decisions to move at least one ship and the oil rig-like SBX-1 are the first of what may be other naval deployments, CNN has learned.
They follow weeks of belligerent rhetoric from North Korea, including threats to use nuclear weapons.
The United States and South Korea have gone ahead with joint military exercises despite the threats, and South Korea warned Monday that any provocative moves from North Korea would trigger a strong response "without any political considerations."