South Korea, the United States and Japan have agreed on close security cooperation through "timely" consultation, after Russia and North Korea signed a new security treaty during a summit in Pyongyang this week, Seoul's top diplomat said Friday. Foreign Minister Cho Tae-yul made the remarks, commenting on his back-to-back phone calls with US Secretary of State Antony Blinken and Japanese Foreign Minister Yoko Kamikawa. On Wednesday, Russian President Vladimir Putin and North Korean lea