Another missile launch from North Korea

Nuclear attack drill comes during military exercises between the U.S. and the South.

SEOUL — North Korea says it simulated a nuclear attack on South Korea with a ballistic missile launch over the weekend that was its fifth demonstration this month to protest the largest joint military exercises in years between the U.S. and South Korea.

North Korea’s leader, Kim Jong Un, instructed his military to hold more drills to sharpen the war readiness of his nuclear forces in the face of “aggression” by his enemies, state media reported.

The South Korean and Japanese militaries detected the short-range missile being launched Sunday into waters off the North’s eastern coast less than an hour before the U.S. flew long-range B-1B bombers for training with South Korean warplanes.

The North characterizes the U.S.-South Korea exercises as a rehearsal to invade, though the allies insist the training is defensive in nature. Some experts say the North uses the exercises as a pretext to advance its weapons programs.

Pyongyang’s official Korean Central News Agency said the missile, which flew about 500 miles, was tipped with a mock nuclear warhead. The agency described the test as successful, saying the device detonated as intended 800 yards above water at a spot that simulated an unspecified “major enemy target” — supposedly reaffirming the reliability of the weapon’s nuclear explosion control devices and warhead detonators.

The report said the launch was the final step of a two-day drill that also involved nuclear command and control exercises and training military units to switch quickly into nuclear counterattack posture, properly handle nuclear weapons systems and execute attack plans.

The exercise was also a “stronger warning” to the U.S. and South Korea, which are “undisguised in their explicit attempt to unleash a war” against the North, KCNA said.

Photos published by state media showed Kim walking in a forest with his daughter and senior military officials and a missile the North described as a tactical nuclear weapon system soaring, spewing flames.

Saying that his enemies are getting “ever more pronounced in their moves for aggression,” Kim laid out unspecified “strategic tasks” for developing his nuclear forces and improving their war readiness, KCNA said. This indicated that the North could up the ante in its weapons demonstrations in coming weeks or months.

Sunday’s launch was the North’s fifth missile event this month and the third since the U.S. and South Korean militaries began joint exercises March 13.

The allies’ drills, which are to continue through Thursday, include computer simulations and the biggest springtime field exercise since 2018.

The North’s weapons tests this year include shortrange missiles fired from land vehicles, cruise missiles launched from a submarine and two different intercontinental ballistic missiles as it tries to demonstrate an ability to conduct dual nuclear attacks on South Korea and the U.S. mainland.

The ICBM test Thursday preceded a summit between South Korean President Yoon Suk Yeol and Japanese Prime Minister Fumio Kishida, who agreed to resume security dialogues and take other steps to improve their often strained relations in the face of North Korean threats.

North Korea is coming off a record year in testing activity, with more than 70 missiles fired in 2022, as Kim accelerates his weapons development aimed at forcing the U.S. to accept the idea of the country as a nuclear power and negotiating badly needed sanctions relief from a position of strength.

In response to the most recent ICBM launch, the United Nations Security Council scheduled an emergency open meeting Monday at the request of the United States, United Kingdom, Albania, Ecuador, France and Malta.

The U.N. Security Council held an informal meeting Friday at which the U.S., its allies and human rights experts shone a spotlight on what they described as the dire rights situation in North Korea.

China and Russia denounced the meeting as a politicized move.

North Korea’s U.N. mission called the meeting about “our nonexistent ‘human rights issue’ ” unlawful. It also said the U.S. held Friday’s meeting “while staging the aggressive joint military exercise which poses a grave threat to our national security.”