N Korea fires missile, flies warplanes near border as South imposes sanctions

North Korea fired a short-range ballistic missile into the sea off its east coast on Friday, South Korea's military said, the latest in a series of launches by the nuclear-armed country amid heightened tensions.

South Korea also scrambled fighter jets when a group of about 10 North Korean military aircraft flew close to their heavily fortified border, and North Korea fired some 170 rounds of artillery into "sea buffer zones" off its east and west coasts, the South's Joint Chiefs of Staff (JCS) said.

South Korea's National Security Council (NSC) condemned the North for escalating tensions, calling its moves a violation of a 2018 bilateral military pact that bans "hostile acts" in the border area.

Seoul imposed its first unilateral sanctions against Pyongyang in nearly five years, blacklisting 15 North Korean individuals and 16 institutions involved in missile development.

The JCS issued a warning to North Korea, urging it to stop provocations and escalating tension.

South Korean President Yoon Suk-yeol told reporters that Pyongyang has been "indiscriminately carrying out provocations," vowing to devise "watertight countermeasures."

North Korea's military issued a statement via state media KCNA on early Friday that it took "strong military countermeasures," over South Korea's artillery fire on Thursday.

South Korea's NSC said the firing was a "regular, legitimate" exercise.

The incidents came after KCNA said leader Kim Jong Un had overseen the launch of two long-range strategic cruise missiles on Wednesday to confirm the reliability of nuclear-capable weapons deployed to military units.

The unprecedented frequency of North Korea's missile launches has raised concerns it may be preparing to resume testing of nuclear bombs for the first time since 2017. Some analysts do not expect any tests before neighbouring China concludes a key ruling Communist Party congress, which begins on 16 Oct.

The US Indo-Pacific Command said it was aware of the latest missile launch and "it does not pose an immediate threat to US personnel or territory, or to our allies."

FLARING TENSION

South Korea's JCS said the missile launched at 1:49 a.m. on Friday (1449 Thursday GMT) from the Sunan area near North Korea's capital, Pyongyang, and flew about 700 km (435 miles) to an altitude of 50 km at a speed of Mach 6.

Japan's coast guard also reported the launch, which was at least the 41st ballistic missile test by the North this year.

The JCS said the aircraft incident occurred for about two hours from 2230 on Thursday (1130 GMT), during which about 10 North Korean warplanes flew as close as 12 km (7 miles) north of the sea border and 25 km (15 miles) north of the Military Demarcation Line.

It said the South Korean air force "conducted an emergency sortie with its superior air force, including the F-35A" and a proportional response manoeuvre.

South Korea's military will hold its annual Hoguk defence drills starting next week, including field training simulated to counter the North's nuclear and missile threats, it added.

In its latest sanctions, Seoul's finance and foreign ministries singled out four officials at the North's military think tank, and 11 at a trading company.

The 16 entities blacklisted include rocket industry and naval transport agencies, as well as trading, construction and electronic firms.

They aided the North's weapons programmes and helped evade international sanctions by conducting research or supplying finance and materials through overseas workers, smuggling and ship operations, the ministries said.

The General Staff of the North's Korean People's Army (KPA) accused the South of taking "provocative action" with the artillery fire, which lasted about 10 hours.

"The KPA sends a stern warning to the South Korean military inciting military tension in the frontline area with reckless action," the spokesman said in a statement carried by KCNA.

North Korea has called its most recent series of missile tests, which included an intermediate range ballistic missile that flew over Japan last week, a show of force against joint South Korean and US military drills involving an aircraft carrier.

Washington imposed new sanctions last week targeting a fuel procurement network supporting Pyongyang's weapons programs.