SEOUL--North Korean leader Kim Jong Un said the test of a newly developed intercontinental ballistic missile confirmed that his country has another “reliable and maximum-capacity” weapon to contain outside threats, as he warned the United States and its allies that their alleged provocative steps would lead to “their self-destruction,” state media reported Saturday.

North Korea’s state media said Kim oversaw the launch of the Hwasong-17 missile, a day after its neighbors said they had detected the launch of an ICBM that showed a potentia ability to reach anywhere in the United States.

The North’s Korean Central News Agency said Kim observed the launch with his wife Ri Sol Ju and their “beloved daughter” as well as senior officials. State media photos showed Kim walking hand-in-hand with his daughter clad in a white jacket and a pair of red shoes as they watched a huge missile loaded on a launch truck. It was the first time for North Korea to publish the photo of Kim’s daughter. Observers say Kim observing a weapons launch with his family suggests that he was confident in its success.

Kim, 38, is the third generation of his family to rule North Korea. South Korean media reported he has three children born in 2010, 2013 and 2017, respectively. It wasn’t immediately known which child he took to the launch site.

Much of Kim’s private life is still unknown, but in 2013, after a trip to Pyongyang, retired NBA star Dennis Rodman told the British newspaper the Guardian that he and Kim had a “relaxing time by the sea” with the leader’s family and that he held Kim’s baby daughter, named Ju Ae.

Friday’s launch was part of the North’s ongoing barrage of missile tests that are seen as an attempt to expand its weapons arsenal and boost its leverage in future diplomacy. Some foreign experts said the Hwasong-17 missile is still under development but is the North’s longest-range ballistic weapon designed to carry multiple nuclear warheads to defeat U.S. missile defense systems.

KCNA said the missile fired from the Pyongyang International Airport traveled up to a maximum altitude of about 6,040 kilometers and flew a distance of about 1,000 km before it landed on the preset area in international waters off the country’s east coast.

“The test-fire clearly proved the reliability of the new major strategic weapon system to be representative of (North Korea’s) strategic forces and its powerful combat performance as the strongest strategic weapon in the world,” KCNA said.

Kim said his country is compelled to further bolster its “overwhelming nuclear deterrence” because U.S.-led military threats have been getting more transparent. Kim stressed the need to have the United States and its allies realize that their military steps against North Korea would “lead to their self-destruction,” KCNA said.

“Kim Jong Un solemnly declared that if the enemies continue to pose threats to the DPRK, frequently introducing nuclear strike means, our Party and government will resolutely react to nukes with nuclear weapons and to total confrontation with all-out confrontation,” KCNA said.

Kim’s statement suggests North Korea will continue its weapons testing activities as the United States is pushing to bolster its securty commitment to its allies South Korea and Japan.

North Korea’s weapons testing spree this year was possible partly because China and Russia have opposed the United States and its allies’ moves to adopt fresh U.N. sanctions on North Korea. There are concerns that North Korea could soon conduct its first nuclear test in five years.

U.S. National Security Council spokesperson Adrienne Watson condemned Friday's launch and said the United States will take “all necessary measures” to guarantee the safety of its territory and South Korea and Japan. Vice President Kamala Harris separately met with the leaders of those countries and of Australia, Canada and New Zealand who are attending a regional forum in Bangkok to discuss a joint response to North Korea.

South Korea and Japan also criticized the launch and held separate aerial drills with U.S. forces. South Korea’s military said it also staged unilateral exercises simulating aerial strikes on North Korean mobile missile launchers at a firing range near its land border with North Korea.

Japanese Defense Minister Yasukazu Hamada said Friday that depending on the weight of a potential warhead, the missile had a range exceeding 15,000 km, “in which case it could cover the entire mainland United States.”

The North’s nuclear and missile arsenals are shrouded in secrecy. Some experts say North Korea is still years away from possessing a functioning nuclear missile, saying it has yet to prove technologies to ensure that warheads survive the harsh conditions of atmospheric reentry. But others say North Korea has likely already acquired such capacities given the number of years spent on its nuclear program.