North Korea warned Friday it could quit the Association of Southeast Asian Nations' Regional Forum if the organization condemns the communist regime's missile tests, a South Korean official said. "If ARF strongly imposes contents of a joint statement against the will of some countries without consensus, we will think about whether we will remain," North Korean Foreign Minister Paek Nam Sun said, according to a South Korean official. The South Korean official did not elaborate. Paek spoke at an opening session of the annual forum that also drew his counterparts from 25 countries and the European Union. The ministers plan to express concern over the missile tests in a joint statement they plan to issue at the end of the forum.