Seoul: South Korea: According to the North Korean military, it has ordered frontline units to fire artillery into the sea for the second day in a row as retaliation for South Korean live-fire drills in an area along the country's inland border. The North Korean People's Army General Staff made the statement a day after the North fired 130 artillery rounds into waters close to its western and eastern sea borders with South Korea in the most recent military action escalating tensions between the rivals. The planned artillery firings on Tuesday, according to an unnamed North Korean military spokesperson, were intended as a warning to the South after the North noticed signs of South Korean artillery exercises near the border. Also Read: In Afghanistan's Mazar-i-Sharif a roadside bomb claims 7 lives In two different testing grounds in the Cheorwon region, the South Korean army is conducting live-fire drills with howitzers and numerous rocket launchers that started on Monday and will last until Wednesday. The military of North Korea stated on Monday that it had warned its western and eastern coastal units to fire artillery as a warning after spotting a number of South Korean projectiles flying southeast from the Cheorwon area. The Joint Chiefs of Staff of South Korea stated that the North Korean shells fired fell within the northern side of the buffer zones established as part of an inter-Korean agreement to lower military tensions in 2018 and urged the North to uphold the agreement. Also Read: Air Force overcomes a challenge with its first hypersonic weapon amid a "new arms race" with China and Russia Since Nov. 3, when about 80 artillery shells landed on North Korea's side of the zone off its eastern coast, this was the first time North Korea had fired weapons into the maritime buffer zones. This year, North Korea has conducted a record number of missile tests, including several of an intercontinental ballistic missile system that may be able to penetrate deep into the US mainland and an intermediate-range missile launched over Japan. In a furious response to an expansion of joint US-South Korean military exercises that North Korea views as preparations for a potential invasion, North Korea has also carried out a number of short-range launches that it described as simulated nuclear attacks on South Korean and US targets. According to experts, North Korea wants to use its nuclear capability to pressure the United States into accepting economic and security concessions from a position of strength. Also Read:Korea wants to assist Vietnam in upgrading its economy North Korea may soon step up the ante by conducting its first nuclear test since 2017 according to South Korean officials.