
North Korea threatened Wednesday to wipe the United States off the map as  Washington and its allies watched for signs the regime will launch a series of  missiles in the coming days.
Off China's coast, a U.S. destroyer was  tailing a North Korean ship suspected of transporting illicit weapons to Myanmar  in what could be the first test of U.N. sanctions passed to punish the nation  for an underground nuclear test last month.
The Kang Nam left the North  Korean port of Nampo a week ago with the USS John S. McCain close behind. The  ship, accused of transporting banned goods in the past, is believed bound for  Myanmar, according to South Korean and U.S. officials.
The new U.N.  Security Council resolution requires member states to seek permission to inspect  suspicious cargo. North Korea has said it would consider interception a  declaration of war and on Wednesday accused the U.S. of seeking to provoke  another Korean War.
"If the U.S. imperialists start another war, the army  and people of Korea will ... wipe out the aggressors on the globe once and for  all," the official Korean Central News Agency said.
The warning came on  the eve of the 59th anniversary of the start of the three-year Korean War, which  ended in a truce in 1953, not a peace treaty, leaving the peninsula in state of  war.
The U.S. has 28,500 troops in South Korea to protect against an  outbreak of hostilities.
Tensions have been high since North Korea  launched a long-range rocket in April and then conducted its second underground  atomic test on May 25.
Reacting to U.N. condemnation of that test, North  Korea walked away from nuclear disarmament talks and warned it would fire a  long-range missile.
North Korea has banned ships from the waters off its  east coast starting Thursday through July 10 for military exercises, Japan's  Coast Guard said.
South Korea's Yonhap news agency reported Wednesday  that the North may fire a Scud missile with a range of up to 310 miles (500  kilometers) or a short-range ground-to-ship missile with a range of 100 miles  (160 kilometers) during the no-sail period.
A senior South Korean  government official said the no-sail ban is believed connected to North Korean  plans to fire short- or mid-range missiles. He spoke on condition of anonymity,  citing department policy.
U.S. defense and counterproliferation officials  in Washington said they also expected the North to launch short- to medium-range  missiles. The officials spoke on condition of anonymity to discuss sensitive  intelligence.
South Korea will expedite the introduction of high-tech  unmanned aerial surveillance systems and "bunker-buster" bombs in response to  North Korea's provocations, the Chosun Ilbo newspaper said, citing unidentified  ruling party members.
Meanwhile, a flurry of diplomatic efforts were  under way to try getting North Korea to return to disarmament  talks.
Russia's top nuclear envoy, Alexei Borodavkin, said after meeting  with his South Korean counterpart that Moscow is open to other formats for  discussion since Pyongyang has pulled out of formal six-nation  negotiations.
In Beijing, top U.S. and Chinese defense officials also  discussed North Korea. U.S. Defense Undersecretary Michele Flournoy was heading  next to Tokyo and Seoul for talks.
South Korea has proposed high-level  "consultations" to discuss North Korea with the U.S., Russia, China and  Japan.