Report: North Korea loads missiles onto launchers NEW: South Korea has sent destroyers with advanced radar to its coasts, news agency says North Korea has loaded two missiles onto launchers, South Korean news agency says Communications suggest possibility of North Korea missile launch, U.S. official says State Department: "This does not need to get hotter" (CNN) -- Two medium-range missiles have been loaded onto mobile launchers in North Korea and are ready to be launched, South Korea's semi-official Yonhap news agency reported Friday, citing military sources in Seoul. A U.S. official with direct knowledge of the information told CNN on Thursday that missile and launch components had been moved to the east coast of North Korea in the "last few days." The latest Yonhap report said the two missiles had now been hidden in an unidentified facility near the east coast. In response, South Korea has sent Aegis destroyers equipped with advanced radar systems to both of its coasts, Yonhap said, citing navy sources. The apparent deployment comes amid further threatening statements by North Korea and heightened tensions in the region -- a situation that "does not need to get hotter," a U.S. State Department spokeswoman said Thursday. The move of the missile and launch equipment could mean that Pyongyang, which unleashed another round of scathing rhetoric accusing the United States of pushing the region to the "brink of war," may be planning a missile launch soon. South Korean officials also believe the weapons on the launchers are Musudan missiles, according to Yonhap. U.S. reducing rhetoric that feeds North Korean rhetoric Communication intercepts in recent days also seem to show that Pyongyang might be planning to launch a mobile ballistic missile in the coming days or weeks, another U.S. official said. The missile doesn't appear to be aimed at the U.S. mainland, Kim said, according to Yonhap. Meanwhile, North Korea has asked the Russian Embassy in Pyongyang to consider a possible evacuation of its staff because of the tensions on the Korean peninsula, the press officer of the Russian Embassy in Pyongyang, Denis Samsonov, told Russian state media. The Russian side has taken note of this suggestion. No decision has been made yet," Samsonov said. CNN's Laura Smith-Spark wrote in London. CNN's Kyung Lah, Judy Kwon and K.J. Kwon contributed in Seoul; Tim Schwarz in Hong Kong; Joe Sterling and Henry Shirley in Atlanta; Barbara Starr, Elise Labott and Tom Cohen in Washington.