North Korea sent an intermediate-range missile over the northern part of Japan and into the Pacific Ocean, completing the country's longest test flight of a ballistic missile.
"I spoke with President Moon [Jae-in] of South Korea last night", the president wrote.
About it reports Reuters, citing the Central Telegraph Agency of Korea (KCNA).
The United States and South Korea conducted bombing exercises on the Korean peninsula as world leaders were set to gather in NY at the United Nations General Assembly where North Korea's nuclear capability will loom heavily over U.S. President Donald Trump and other leaders. Xinhua did not directly link the drills to current tension over North Korea.
"The increased moves of the USA and its vassal forces to impose sanctions and pressure ... will only increase our pace towards the ultimate completion of the state nuclear force", the North's foreign ministry spokesman said in a statement carried by its official KCNA news agency.
In response, Chinese Foreign Ministry spokesman Lu Kang said the most pressing task was for all parties to enforce the latest United Nations resolutions on North Korea fully, rather than "deliberately complicating the issue".
China and Russian Federation have repeatedly called for a diplomatic solution to the crisis with North Korea and only agreed to the new United Nations sanctions after they were softened by the US.
Mr Trump previously warned that "all options" were on the table and that North Korea would face "fire and fury" if it continued to threaten the US.
The United Nations Security Council will reportedly hold a ministerial-level meeting on Thursday in order to discuss the threat from the proliferation of weapons of mass destruction and the North Korean nuclear and missile threats.
"This is the most vicious, unethical and inhumane act of hostility to physically exterminate the people of the DPRK, let alone its system and government", it said.
Under an agreement reached at bilateral talks in Stockholm in May 2014, North Korea promised to reopen its investigation into the whereabouts of the remaining Japanese abductees and set up a special committee for the probe.
The US, an ally of Japan that has extensive military presence in the region, has reacted harshly to North Korea's missile launches in particular and the weapons programs in general.