The national security advisers of the United States, South Korea and Japan called on Saturday for a stronger international push to suppress North Korea’s development of nuclear weapons and missiles and its military cooperation with other countries amid concerns about its alleged arms transfers to Russia, Paralel.Az reports citing Associated Press.

The meeting in Seoul came as tensions on the Korean Peninsula are at their highest in years, with North Korean leader Kim Jong Un accelerating the expansion of his nuclear and missile program and flaunting an escalatory nuclear doctrine that authorizes the preemptive use of nuclear weapons.

The United States and its Asian allies have responded by increasing the visibility of their trilateral security cooperation in the region and strengthening their combined military exercises, which Kim condemns as invasion rehearsals.

In a joint news conference after the meeting, Cho said the three security advisers reaffirmed North Korea’s obligations under multiple U.N. Security Council resolutions that call for its denuclearization and bans any weapons trade with other countries.