Seoul, South Korea CNN  — 

North Korea said that it conducted a “test firing of a new kind” of intercontinental ballistic missile (ICBM) on Friday, according to the government-run KCNA news agency.

Japan warned on earlier on Friday that the missile had the potential range to reach the US mainland.

KCNA claimed that the “new” missile was a Hwaseong-17, and said that it launched from Pyongyang International Airfield and flew a distance of 999.2 km (621 miles).

The state news agency also published multiple still images of leader Kim Jong Un, who reportedly oversaw the launch.

The ICBM was launched around 10:15 a.m. local time from the Sunan area of the North Korean capital Pyongyang. South Korea’s Joint Chiefs of Staff (JCS) said. The US said it was a “brazen” violation of UN resolutions.

Japanese Prime Minister Fumio Kishida said it likely fell in Japan’s exclusive economic zone (EEZ), about 210 kilometers (130 miles) west of the Japanese island of Oshima Oshima, according to the Japan Coast Guard. It did not fly over Japan.

“North Korea is continuing to carry out provocative actions at frequency never seen before,” Kishida told reporters Friday at the Asia-Pacific Economic Cooperation (APEC) meeting in Bangkok, Thailand. “I want to restate that we cannot accept such actions.”

The Japanese government will continue to collect and analyze information and provide prompt updates to the public, he said. So far, there have been no reports of damage to vessels at sea, Kishida added.

After guiding the launch of the ICBM on Friday, Kim said that North Korea should “clearly demonstrate their strongest will to retaliate the hysteric aggression war drills by the enemies seeking to destroy peace and stability in the Korean peninsula and the region,” referring to the US and South Korea

He also warned that his country will take a “more offensive” counteraction if the US “make a military bluffing in the Korean peninsula and its surrounding area,” according to KCNA.

“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.

According to the JCS, the ICBM traveled at 22 times the speed of sound, adding that details were being analyzed by intelligence authorities in South Korea and the US.

Japanese Defense Minister Yasukazu Hamada said it had the potential to reach the US mainland. “The ICBM-class ballistic missile launched this time could have a range of over 15,000 km when calculated based on the flight distance of this ICBM,” Hamada said in a statement. “It depends on the weight of the warhead, but in that case, the US mainland would be included in the range.”

It is not the first time North Korea has launched an ICBM that experts and officials have assessed could theoretically reach the US.

Friday’s missile was shorter in altitude and distance compared to Pyongyang’s missile test on March 24, which recorded the highest altitude and longest duration of any North Korean missile ever tested, according to a report from the Korean Central News Agency (KCNA) at the time. That missile reached an altitude of 6,248.5 kilometers (3,905 miles) and flew a distance of 1,090 kilometers (681 miles), KCNA reported.

And in 2017, then-US Defense Secretary James Mattis, said a missile launched by North Korea in that year demonstrated the ability to hit “everything in the world.”

On Friday morning US Vice President Kamala Harris gathered on the sidelines of the APEC summit with leaders from Japan, South Korea, Australia, New Zealand, and Canada to condemn the launch, in a previously unscheduled media briefing.

“I have asked this group of allies and partners to come together to join us in condemning North Korea’s long range ballistic missile launch,” she said. “I’ve also asked them to join in so that we as allies and partners can consult on next steps. This conduct by North Korea most recently is a brazen violation of the multiple UN Security resolutions. It destabilizes security in the region and unnecessarily raises tensions.”

A senior administration official described the missile as “further escalation,” because of its long-range capability and its capability of reaching the US mainland.

South Korean President Yoon Suk Yeol on Friday also ordered the “active execution” of strengthened extended deterrence measures against North Korea.

The President said Seoul will strengthen its alliance with Washington, and bolster its defense posture and cooperation over security with the US and Japan.

“The government will not tolerate North Korea’s provocations,” his office said in a statement. “The government has overwhelming response capability and willingness to immediately react to any North Korean provocations, so North Korea should not misjudge this.”

It added that North Korea cannot gain anything through continuous provocations, while warning that sanctions against the North will only be strengthened, resulting in Pyongyang’s further international isolation.

Calling the launch a “significant provocation and a serious act of threat,” the JCS warned the North of violating the UN Security Council’s resolution and urged it to stop immediately.

The Misawa Air Base issued a shelter in place alert after the firing of the missile, according to US Air Force Col. Greg Hignite, director of public affairs for US Forces Japan. It has now been lifted and the US military is still analyzing the flight path, he said.

US President Joe Biden has been briefed on the missile launch and his national security team will “continue close consultations with Allies and partners,” National Security Council spokesperson Adrienne Watson said in statement Friday.

“The door has not closed on diplomacy, but Pyongyang must immediately cease its destabilizing actions and instead choose diplomatic engagement,” Watson said. “The United States will take all necessary measures to ensure the security of the American homeland and Republic of Korea and Japanese allies.”

Friday’s launch comes one day after Pyongyang fired a short-range ballistic missile into the waters off the east coast of the Korean Peninsula, and issued a stern warning to the United States of a “fiercer military counteraction” to its tighter defense ties with South Korea and Japan.

It’s the second suspected test launch of an ICBM this month – an earlier missile fired on November 3 appeared to have failed, a South Korean government source told CNN at the time.

The aggressive acceleration in weapons testing and rhetoric has sparked alarm in the region, with the US, South Korea and Japan responding with missile launches and joint military exercises.

Leif-Eric Easley, associate professor of International Studies at Ewha Womans University in Seoul, said North Korea is “trying to disrupt international cooperation against it by escalating military tensions and suggesting it has the capability of holding American cities at risk of nuclear attack.”

North Korea has carried out missile tests on 34 days this year, sometimes firing multiple missiles in a single day, according to a CNN count. The tally includes both cruise and ballistic missiles, with the latter making up the majority of North Korean test this year.

There are substantial differences between these two types of missiles.

A ballistic missile is launched with a rocket and travels outside Earth’s atmosphere, gliding in space before it re-enters the atmosphere and descends, powered only by gravity to its target.

A cruise missile is powered by a jet engine, stays inside Earth’s atmosphere during its flight and is maneuverable with control surfaces similar to an airplane’s.

Ankit Panda, senior fellow in the Nuclear Policy Program at the Carnegie Endowment for International Peace, said that while he wouldn’t see Friday’s presumed ICBM launch “as a message, per se,” it can be viewed as part of North Korea’s “process of developing capabilities Kim has identified as essential for the modernization of their nuclear forces.”

The US and international observers have been warning for months that North Korea appears to be preparing for an underground nuclear test, with satellite imagery showing activity at the nuclear test site. Such a test would be the hermit nation’s first in five years.

Jeffrey Lewis, director of the East Asia Nonproliferation Program at Center for Non-proliferation Studies, said the ICBM test was designed to validate parts of North Korea’s missile program, something that Kim Jong Un has vowed to do this year.

The recent short-range tests “are exercises for frontline artillery units practicing preemptive nuclear strikes,” Lewis said.

He dismissed any political or negotiating message from the tests.

“I wouldn’t think about these tests as primarily signaling. North Korea isn’t interested talking right now,” Lewis said.