Russsia-North Korea agreement promised mutual defence assistance if either is attacked. Seoul said it might reconsider its arms policy on Ukraine.
South Korea summoned the Russian ambassador to protest the country's new defence pact with North Korea on Friday, as border tensions continued to rise with vague threats and brief, seemingly accidental incursions by North Korean troops.
Earlier Friday, the powerful sister of North Korean leader Kim Jong Un issued a vague threat of retaliation after South Korean activists flew balloons carrying anti-Pyongyang propaganda leaflets across the border, and South Korea's military said it had fired warning shots the previous day to repel North Korean soldiers who briefly crossed the rivals' land border for the third time this month.
That came two days after Moscow and Pyongyang reached a pact vowing mutual defence assistance if either is attacked, and a day after Seoul responded by saying it would consider providing arms to Ukraine to fight Russia's invasion.
South Korean Vice Foreign Minister Kim Hong Kyun summoned Russian Ambassador Georgy Zinoviev to convey Seoul's stance on the deal between Putin and Kim and on alleged military cooperation between Russia and North Korea. Seoul's Foreign Ministry didn't immediately confirm what was said during the meeting.
Leafletting campaigns by South Korean civilian activists in recent weeks have prompted a resumption of Cold War-style psychological warfare along the inter-Korean border.
The South Korean civilian activists, led by North Korean defector Park Sang-hak, said it sent 20 balloons carrying 300,000 propaganda leaflets, 5,000 USB sticks with South Korean pop songs and TV dramas, and 3,000 U.S. dollar bills from the South Korean border town of Paju on Thursday night.
Pyongyang resents such material and fears it could demoralize front-line troops and residents and eventually weaken Kim Jong Un's grip on power, analysts say.
In a statement carried by North Korea's official Korean Central News Agency, Kim Yo Jong, one of her brother's top foreign policy officials, called the activists “defector scum” and issued what appeared to be a threat of retaliation.
“When you do something you were clearly warned not to do, it's only natural that you will find yourself dealing with something you didn't have to,” she said, without specifying what the North would do.
After previous leafletting by South Korean activists, North Korea launched more than 1,000 balloons that dropped tons of trash in South Korea, smashing roof tiles and windows and causing other property damage. Kim Yo Jong previously hinted that balloons could become the North's standard response to leafletting, saying that the North would respond by “scattering dozens of times more rubbish than is being scattered on us.”
In response, South Korea resumed anti-North Korea propaganda broadcasts with military loudspeakers installed at the border for the first time in years, to which Kim Yo Jong, in another state media statement, warned that Seoul was “creating a prelude to a very dangerous situation.”
Tensions between the Koreas are at their highest in years as Kim Jong Un accelerates his nuclear weapons and missile development and attempts to strengthen his regional footing by aligning with Russian President Vladimir Putin in a standoff against the U.S.-led West.
South Korea, a growing arms exporter with a well-equipped military backed by the United States, says it is considering upping support for Ukraine in response. Seoul has already provided humanitarian aid and other support while joining U.S.-led economic sanctions against Moscow. But it has not directly provided arms, citing a long-standing policy of not supplying weapons to countries actively engaged in conflict.
Putin told reporters in Hanoi, Vietnam, on Thursday that supplying weapons to Ukraine would be “a very big mistake,” and said South Korea “shouldn't worry” about the agreement if it isn't planning aggression against Pyongyang.
North Korea is extremely sensitive to criticism of Kim's authoritarian rule and efforts to reach its people with foreign news and other media.
In 2015, when South Korea restarted loudspeaker broadcasts for the first time in 11 years, North Korea fired artillery rounds across the border, prompting South Korea to return fire, according to South Korean officials. No casualties were reported.
South Korea's military said there are signs that North Korea was installing its own speakers at the border, although they weren't yet working.
In the latest border incident, South Korea's Joint Chiefs of Staff said several North Korean soldiers engaged in unspecified construction work briefly crossed the military demarcation line that divides the two countries at around 11 a.m. Thursday.
