(ATTN: ADDS more info, analysis in paras 14-18, 21-25, 2nd photo)
By Choi Soo-hyang
SEOUL, March 25 (Yonhap) -- North Korea fired what appeared to be two short-range ballistic missiles into the East Sea on Thursday, the Joint Chiefs of Staff (JCS) said, an apparent move pressing the United States as Washington prepares to announce a new policy on the North.
The missiles were fired from the North's eastern town of Hamju, South Hamgyong Province, at 7:06 a.m and 7:25 a.m. and flew around 450 kilometers with an altitude of 60 km, according to the military.
"South Korean and U.S. intelligence authorities are analyzing the projectiles in detail, weighing the possibility that they could be short-range ballistic missiles," a JCS officer said.
North Korea last fired a ballistic missile in March 2020.
It was not immediately known whether the North's leader Kim Jong-un oversaw the firings.
The presidential office Cheong Wa Dae convened an emergency National Security Council meeting and expressed "deep concern" that the missile launches came amid the U.S. policy review.
Thursday's launches mark a gradual ratcheting up of tensions by the North as they came four days after the country fired two cruise missiles into the Yellow Sea on Sunday.
The U.S. brushed off the cruise missile launches as part of "normal testing" not banned under U.N. sanctions resolutions, with President Joe Biden saying, "nothing much has changed."
But ballistic missile launches constitute a violation of U.N. Security Council resolutions. They have a much longer range than cruise missiles of the same size and move quickly along their flight path.
Still, Pyongyang has maintained a self-imposed moratorium on nuclear and long-range missile testing since late 2017.
Washington's reaction to the latest missile launches was not immediately available.
But the U.S. military said they highlight the threat the North poses.
"This activity highlights the threat that North Korea's illicit weapons program poses to its neighbors and the international community," USFK spokesman Col. Lee Peters said. "The U.S. commitment to the defense of the Republic of Korea remains ironclad."
Experts say the North could have tested an upgraded version of its KN-23 missile, which resembles Russia's Iskander, given the projectiles' flight range and apogee.
Compared to the original version, the new missile -- showcased during a military parade in Pyongyang in January -- has a conical warhead with a five-axle transporter erector launcher (TEL).
The North's Iskander is known to have a flight range of 400 to 600 km and mainly targets South Korea.
Rather than following a general parabolic trajectory, the missile shows a more complicated path by doing a so-called pull-up maneuver over the course of its flight.
Asked whether the latest missiles showed such a pull-up maneuver, officials said analysis was still under way.
The latest launch also came as the Biden administration was completing its North Korea policy review.
North Korea's First Vice Foreign Minister Choe Son-hui said last week any contact and dialogue with the U.S. can be possible only when Washington rolls back its "hostile policy" toward it.
Kim Yo-jong, the powerful sister of the North Korean leader, also earlier warned the U.S. not to "cause a stink" if it wants to sleep in peace for the next four years.
Cheong Seong-chang, a senior fellow at the Sejong Institute think tank, said that if the U.S. sanctions the North for the latest missile launches, Pyongyang would consider it "confirmation" of Washington's "hostile policy" and move on to testing other weapons, such as a submarine-launched ballistic missile.
"North Korea's launch of ballistic missiles put the Biden administration at a crossroads of whether to return to the Obama administration-era U.S.-North Korea relations or to pursue new good-for-good relations," he said.
The North could have determined it is practically impossible to hold talks with the U.S. after watching U.S. Secretary of State Antony Blinken denounce the North's human rights record during his trip to Seoul earlier this month, Chung said.
"North Korea is expected to continue with a show of force at least until the April 15 birthday of Kim Il-sung, while considering how to deal with (the U.S.) going forward," he said, referring to the North's national founder and the grandfather of current leader Kim Jong-un.
Kim held three meetings with former U.S. President Donald Trump, but denuclearization talks remain stalled since the collapse of their Hanoi summit in February 2019.
The U.S. is scheduled to hold a security meeting with South Korea and Japan next week to discuss how to deal with issues involving North Korea.
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