WASHINGTON, D.C.: The White House has announced that the US national security advisor spoke separately with his South Korean and Japanese counterparts about North Korea's missile launch over Japan on Tuesday.

'In both calls, the National Security Advisors consulted on appropriate and robust joint and international responses and National Security Advisor Jake Sullivan reinforced the United States' ironclad commitments to the defense of Japan and the ROK (South Korea),' national security spokeswoman Adrienne Watson said in a statement issued on Monday evening, local time.