South Korean President Yoon Suk-yeol condemned possible Russian assistance for North Korea’s nuclear program as a “direct provocation,” warning that Seoul and its allies would respond to military cooperation between Moscow and Pyongyang.

In his speech at the U.N. General Assembly on Wednesday, Yoon also criticized Russia for invading Ukraine and allegedly purchasing weapons from North Korea despite being a permanent member of the U.N. Security Council.

“If North Korea acquires the information and technology necessary to enhance its WMD capabilities in exchange for supporting Russia with conventional weapons, the deal will be a direct provocation threatening the peace and