South Korea, Japan warn North Korea on missile

Japan Airlines Corp said that because of the launch warning, the airline would alter flight paths between April 4 and 8 on routes to London, Paris, Frankfurt, Amsterdam, Rome, Milan and Moscow, as well as Honolulu and Kona in Hawaii.

All Nippon Airways Co said that during the same period it would be altering flight paths on routes between Tokyo and London, Paris, Frankfurt.

North Korea on Friday again stopped crossings of South Korean personnel into a jointly run factory park on its side of the armed border, four days after cutting off military communication and temporarily suspending border crossings for a day, the Unification Ministry in Seoul said.

More than 200 outh Koreans who are at the Kaesong industrial park remain stranded at the plant just north of the border, once hailed as a model in reconciliation.

South Korean President Lee Myung-bak urged the North to stop raising tension with its rich neighbor.

"The North is threatening us from land, sea and sky," Lee said at the Naval Academy. "It's not hesitating to threaten civilians as well as making military threats."

Analysts said the early April launch is timed to coincide with the opening of its Supreme People's Assembly and meant as a celebration of the re-election of leader Kim Jong-il as chairman of the powerful National Defense Commission.

(Additional reporting by Jon Herskovitz and Kim Junghyun in Seoul and the Tokyo Bureau; Editing by Bill Tarrant)