The United States has imposed new sanctions on two North Korean officials—only days after the U.N. Security Council imposed another round of sanctions against North Korea in response to its recent ballistic missile tests. North Korea called the most recent U.N. Security Council sanctions “an act of war.” The new U.S. Treasury sanctions will freeze all U.S. assets of two North Korean officials accused of being behind the missile program. Russia has offered to act as mediator between North Korea and the United States amid the escalating conflict between the two countries. North Korea has repeatedly tested intercontinental ballistic missiles over the last year, while President Trump has repeatedly threatened to use nuclear weapons against North Korea, saying he would “totally destroy” the nation of 25 million people.