The North Korean aircraft flew north of the so-called tactical meter line, 12 miles north of the Military Demarcation Line (MDL), between 11 a.m. and 3 p.m. local time, South Korea’s military said. South Korea’s response included F-35A stealth fighters. About 240 aircraft participating in the Vigilant Storm air exercise with the US continued the exercises, the military said. The maneuvers came after North Korea fired more than 80 artillery rounds into the sea overnight. Image: A South Korean soldier stands guard Friday near the demilitarized zone separating the two Koreas in Paju, South Korea It also fired multiple missiles into the sea on Thursday, possibly including a banned intercontinental ballistic missile (ICBM), prompting evacuation warnings and disrupting bullet train services in Japan. Japan’s military has lost track of a suspected ICBM over water between the Korean Peninsula and Japan, with South Korea saying it was likely a miss. On Wednesday, the North fired an unprecedented 17 missiles in one day, with one landing near the rivals’ tense maritime border. It was the first time a ballistic missile had landed near the South’s waters since the countries’ partition in 1948. The missile landed outside South Korea’s territorial waters but south of the Northern Limit Line (NLL), a disputed maritime border between the Koreas. Hours before the missile launch, the North threatened to use nuclear weapons to make the US and South Korea “pay the most horrific price in history” in protest at the two nations’ ongoing military exercises that it sees as a rehearsal for invasion. Washington said the drills were “purely defensive in nature” and that the US had made clear to North Korea that it had no hostile intent towards the country. Use Chrome browser for more accessible video player 0:55 Japan sirens as North Korea launches missiles The UN Security Council will convene an emergency meeting on Friday following an increase in missile launches this week by North Korea. In recent years the 15-member council has been divided over how to deal with North Korea. In May, China and Russia vetoed a US-led push for more UN sanctions in response to North Korea’s missile launches.