Lee made the offer in an interview with the Washington Post last week during a visit to the United States for talks with President Bush, saying the countries need a better channel of communication.

Relations between the divided Koreas have chilled since Lee took office in February with a pledge to get tough on Pyongyang. Lee says he opposes unconditional assistance to the North and calls for its nuclear disarmament as a precondition for economic cooperation.

North Korea has bristled at the hard-line stance, and since late last month has expelled South Korean officials from a shared industrial complex, test-fired missiles, and threatened to reduce the South to "ashes." The Korean War ended in 1953 with a truce, not a peace treaty, which means the two sides technically remain at war. Relations improved significantly under Lee's two liberal predecessors -- Kim Dae-jung and Roh Moo-hyun -- who pursued detente with North Korea with massive aid and concessions