South Korea fired warning shots after North Korean soldiers crossed border on Thursday SEOUL: South Korea’s Foreign Minister Cho Tae-yul and US Secretary of State Antony Blinken condemned the new treaty between Russia and North Korea as a serious threat to regional peace and stability, Seoul’s foreign ministry said in a statement on Friday. The two in a phone call on Thursday also discussed ways to respond to the pact, and agreed to closely monitor the situation, the foreign ministry said. Blinken said the United States supports South Korea’s responses to the agreement, in which Moscow and Pyongyang said each country would provide immediate military assistance if either faces armed aggression. Cho said any cooperation to help strengthen North Korea’s military capabilities is a clear violation of the UN Security Council resolutions, according to the statement. The United States will consider various ways to respond to the threat to international peace and stability from Russia and North Korea, Blinken was quoted as saying by the ministry. South Korean National Security Adviser Chang Ho-jin said on Thursday that Seoul will review the possibility of supplying weapons to Ukraine in response to the landmark pact. Relations between the Korean neighbors had been tense again lately, with the North repeatedly dumping trash into South Korean territory via cheap balloons. On Thursday morning, South Korea’s military fired warning shots after several North Korean soldiers crossed the border, the Yonhap news agency reported on Friday citing the Joint Chiefs of Staff (JCS). The soldiers retreated immediately after the warning shots were fired, the report said. They had breached the Military Demarcation Line running through the middle of the demilitarized zone (DMZ), where they were working around 11 a.m. (0200 GMT) on Thursday, South Korea said. It is at least the third such incident this month. South Korea’s military fired warning shots on Tuesday after dozens of North Korean soldiers breached the demarcation line. The incident came after Russian President Vladimir Putin visited Pyongyang for the first time in 24 years earlier this week.