SEOUL, South Korea (AP) — North Korea test-fired its first intercontinental ballistic missile in three months on Wednesday, days after it threatened “shocking” consequences to protest what it called provocative United States (US) reconnaissance activity near its territory.

Some experts say North Korea likely launched its developmental, road-mobile Hwasong-18 ICBM, a type of solid-fuel weapon that is harder to detect and intercept than its liquid-fuel ICBMs. North Korean leader Kim Jong Un previously called the Hwasong-18 the most powerful weapon of his nuclear forces.

The missile, fired from North Korea’s capital region around 10 a.m., flew about 1,000 kilometres (620 miles) at a maximum altitude of 6,000 kilometres (3,730 miles) before landing in waters between the Korean Peninsula and Japan, according to South Korean and Japanese assessments. They said the missile was launched at a high angle in what observers say was an apparent attempt to avoid neighbouring countries.

Japanese Chief Cabinet Secretary Hirokazu Matsuno said the missile flew for 74 minutes — the longest flight time recorded by any weapon launched by North Korea. The previous record of 71 minutes was registered during the test flight of the liquid-fuel Hwasong-17 ICBM last year.

South Korea’s military called the launch “a grave provocation” and urged North Korea to refrain from additional launches. Matsuno denounced North Korea’s repeated missile launches as “threats to the peace and safety of Japan, the region and international society.”

In a trilateral phone call, the chief nuclear envoys of South Korea, Japan and the US agreed to sternly deal with North Korean provocations and boost their coordination to promote a stronger international response to the North’s nuclear and missile programs, according to Seoul’s Foreign Ministry.

The launch came while South Korean President Yoon Suk Yeol and Japanese Prime Minister Fumio Kishida were attending the NATO summit in Vilnius, Lithuania. In an emergency meeting of South Korea’s security council convened by video in Lithuania, Yoon warned North Korea would face more powerful international sanctions due to its illicit weapons programs.

North Korea’s ICBM program targets the mainland United States, while its shorter-range missiles are designed to hit US regional allies like South Korea and Japan.

Since 2017, North Korea has performed a slew of ICBM tests, but some experts say the North still has some technologies to master to possess functioning nuclear-armed missiles capable of reaching major US cities.