South Korean intelligence claims North Korea has moved a mid-range Musudan missile to the country's east coast, which would put South Korea, Japan and Guam in range.
US Defence Secretary Chuck Hagel admitted that North Korea is a "clear danger".
"As they have ratcheted up their dangerous rhetoric and some of the actions they have taken over the last few weeks present a real and clear danger," he said.
The US Department of Defence said on Wednesday it would deploy the ballistic Terminal High Altitude Area Defence System (Thaad) in the coming weeks.
Separately, Pyongyang has again blocked South Korean access to the Kaesong joint industrial zone. It was the second day the North had blocked the border crossing.
Image: © Getty
Copyright is owned by Asia Outlook and/or Outlook Publishing. All rights reserved.