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SEOUL, South Korea —\u00a0South Korea\u2019s military said\u00a0North Korea<\/a>\u00a0disrupted GPS signals from border areas for the second-straight day on Saturday, affecting an unspecified number of flights and vessel operations.<\/p>\n\n\n\n Tensions between the rival Koreas have escalated as North Korean leader Kim Jong Un flaunts his advancing nuclear and missile program<\/a> and engages in electronic and psychological warfare, such as flying thousands of balloons to drop trash and anti-South Korean propaganda leaflets<\/a> in the South.<\/p>\n\n\n\n South Korea\u2019s Joint Chiefs of Staff said North Korean operations to manipulate GPS signals were detected from around the western border city of Kaesong and the nearby city of Haeju on Friday and Saturday, and said the activities disrupted dozens of civilian aircraft and several vessels.<\/p>\n\n\n\n While warning aircraft and vessels near western border areas, South Korea\u2019s military did not specify how North Korea was interfering with GPS signals or detail the extent of disruptions.<\/p>\n\n\n\n \u201cWe urge North Korea to stop GPS interference provocations immediately and strongly warn that it will be held fully accountable for any resulting consequences,\u201d the South\u2019s joint chiefs said in a statement.<\/p>\n\n\n\n North Korea\u2019s GPS signal disruptions and balloon campaigns highlight the vulnerability of South Korea\u2019s Incheon International Airport, its main transportation gateway, analyst Sukjoon Yoon recently wrote on the North Korea-focused 38 North website.<\/p>\n\n\n\n The airport, which carries 56 million people and 3.6 million tons of cargo annually, is less than 100 kilometers (62 miles) from North Korea.<\/p>\n\n\n\n \u201cNo major aviation incidents have resulted to date, but GPS interference can endanger commercial airlines flying in poor visibility, and it is a violation of international conventions on navigational safety,\u201d Yoon wrote. He said that in 2024, North Korean trash balloons halted the airport\u2019s runway operations 12 different times for a total of 265 minutes.<\/p>\n\n\n\n Kim has shown more hostility this year toward Seoul\u2019s conservative government \u2014 which maintains a hard line on Pyongyang \u2014 with the North abandoning its long-standing goals of reconciliation with its war-divided rival and rewriting its constitution<\/a> to cement South Korea as a permanent adversary.<\/p>\n\n\n\n North Korea also blew up sections of its unused road and rail routes<\/a> linked with the South in October in a symbolic display of anger toward Seoul, and opened November with a flight-test of a new intercontinental ballistic missile<\/a> to dial up pressure on Washington.<\/p>\n\n\n\n South Korean officials say North Korean activities to disrupt GPS signals from western border regions increased as the country began launching trash-carrying balloons<\/a> toward the South in late May, which the North described as a retaliation against South Korean civilian activists flying anti-North Korean propaganda leaflets<\/a> across the border.<\/p>\n\n\n\n