Russia appears to have provided North Korea with extensive assistance in designing and rapidly constructing two advanced destroyers, the most modern in Pyongyang's fleet, the Wall Street Journal (WSJ) reported on June 25.

The destroyers, part of the new Choe Hyon class, were built in just over a year — an unusually fast timeline that analysts say would have been impossible without foreign support.

Satellite imagery and launch footage suggest a clear Russian design influence, including the distinctive bow and stern structure found on Russia's Admiral Grigorovich-class frigates.

One of the destroyers, launched in April, was followed in May by a failed launch during which the second vessel capsized in front of North Korean leader Kim Jong Un.

The incident prompted outrage from Kim, who condemned the failed launch as a "criminal act" and placed blame on several state institutions, accusing relevant officials of "irresponsibility" which "could not be tolerated,"North Korean state-run Korean Central News Agency (KCNA) reported.

According to the agency, a malfunction in the launch mechanism caused the stern of the 5,000-ton destroyer to slide into the water too early, while the rest of the ship remained stuck.

Damage to the bottom of the ship threw it off balance, and the bow failed to move, resulting in "a serious accident."

The wreck was recovered in early June.

Mike Plunkett, a senior naval analyst at Janes, an open-source intelligence company, told the WSJ that the ships appeared to have signs of Russian involvement. He pointed to identical hull lines and profiles where the hull connects to the side, between the Korean and Russian vessels.

One of the destroyers appears to be equipped with the Russian Pantsir-M system, marking the first time this advanced air-defense system has been seen on a non-Russian warship.

Plunkett noted that the ventilation grilles for the engine room were sealed with metal plates, indicating the ships might not yet have engines.

The news comes amid deepening military ties between Russia and North Korea. According to a May 29 report by the Multilateral Sanctions Monitoring Team (MSMT), Pyongyang shipped up to 9 million artillery shells and at least 100 ballistic missiles to Russia in 2024 alone.

In fall 2024, North Korea's role in Russia's war grew as it sent thousands of troops to Russia's western border to assist in repelling a Ukrainian incursion.

The partnership has also expanded into drone cooperation. On June 9, Ukraine's military intelligence chief, Kyrylo Budanov, said the two nations had agreed to begin production of Iranian-designed Shahed-136 drones on North Korean territory.

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North Korea is considering sending up to 25,000 workers to Russia to assist in the mass production of Shahed-type attack drones, Japan's public broadcaster NHK reported on June 19, citing unnamed diplomatic sources in the West and Russia.

The workers would be sent to the Alabuga Special Economic Zone in Russia's Republic of Tatarstan, where Moscow operates a facility for assembling Iranian-designed Shahed drones. In return, Pyongyang is reportedly seeking drone operation training.

Shahed drones, known for their low cost and heavy explosive payloads, have been used extensively by Russia since late 2022 to attack Ukrainian cities. The Alabuga site has been repeatedly struck by Ukrainian forces in an attempt to disrupt production.

The media report follows a series of rapid developments in military cooperation between Moscow and Pyongyang. Russian Security Council Secretary Sergei Shoigu visited North Korea on June 17, reportedly on a "special assignment" from Russian President Vladimir Putin.

After meeting Kim, Shoigu said that Pyongyang had agreed to send 1,000 combat engineers and 5,000 military builders to Russia's Kursk Oblast to assist in reconstruction.

Ukraine controlled a part of Kursk Oblast following a cross-border offensive in August 2024. Russia regained much of the lost territory during a March 2025 counteroffensive that included backing from North Korean forces. According to estimates, North Korea has suffered over 6,000 casualties during the offensive operations.

Ukraine's military intelligence chief, Kyrylo Budanov, said on June 9 that Pyongyang and Moscow have agreed to start establishing domestic production of Shahed-136 drones on North Korean soil.

Kim remains a vocal ally of Putin, supplying not only soldiers but also artillery, drones, and ballistic missiles. During Russia's May 9 Victory Day Parade in Moscow, Putin personally greeted North Korean troops, though Kim did not attend.

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Editor's note: This item has been updated to include additional details.  

Russian Security Council Secretary Sergei Shoigu arrived in Pyongyang on June 17 on a "special assignment" from President Vladimir Putin, Russian state-controlled news agency TASS reported on June 17.

Shoigu met with North Korean leader Kim Jong Un during the visit, TASS reported, citing a correspondent on the ground. The purpose of the visit has not been officially disclosed, but it occurs amid intensifying military cooperation between the two nations.

After the meeting with Kim, Shoigu announced that North Korea had decided to send 1,000 sappers and 5,000 military builders to rebuild Russia's Kursk Oblast, according to TASS.

Ukraine initially captured 1,300 square kilometers (500 square miles) of Russian territory during a cross-border operation that began in August 2024. Since then, Ukraine has lost most of the territory after Moscow launched a counteroffensive in March, which was supported by Pyongyang's military.

According to a June 15 report from the United Kingdom's defense intelligence, over 6,000 North Korean soldiers have been killed or wounded during operations in Russia's Kursk Oblast.

According to TASS, Shoigu also discussed in Pyongyang the creation of memorials in Russia and North Korea in memory of Korean soldiers who died fighting in the Kursk Oblast.

North Korea has emerged as one of Russia's closest military partners during its full-scale invasion of Ukraine. Since late 2023, Pyongyang has supplied Moscow with millions of artillery shells, at least 100 ballistic missiles, and reportedly deployed more than 11,000 troops to assist Russian operations in Ukraine’s border regions.

The U.K. said Pyongyang's losses account for more than half of the North Korean contingent deployed to the region in fall 2024. British officials attributed the high casualties to highly attritional ground assaults.

Earlier this year, South Korea's Joint Chiefs of Staff reported that North Korea sent an additional 3,000 soldiers to Russia in January and February to replenish losses.

In June 2024, Russia and North Korea signed a mutual defense pact obligating both countries to provide military assistance in the event of an external attack. Though North Korea only publicly acknowledged its participation in Russia's war against Ukraine in April 2025, open-source reports and intelligence assessments have indicated its involvement since at least the fall of 2024.

The Multilateral Sanctions Monitoring Team (MSMT), a United Nations-affiliated watchdog, reported in May that North Korea and Russia had engaged in "unlawful military cooperation" in violation of multiple UN Security Council resolutions. This included arms transfers, deployment of combat troops, petroleum exports to North Korea exceeding UN caps, and mutual military training.

According to MSMT findings, Russian-flagged vessels delivered up to 9 million rounds of artillery and multiple rocket launcher ammunition from North Korea to southwestern Russia in 2024 alone. These weapons were subsequently used in attacks against Ukrainian infrastructure and civilian targets in cities including Kyiv and Zaporizhzhia.

Russia has also reportedly provided advanced military technology to North Korea, including ballistic missile guidance systems, electronic warfare platforms, and short-range air defense systems. One MSMT participating state confirmed the transfer of at least one Pantsir-class vehicle to Pyongyang.

Kim Jong Un described his country's involvement in Russia's war against Ukraine as a "sacred mission" during a public address in May.

Shoigu's visit to North Korea comes amid intensified Russian aerial attacks across Ukraine, including the use of North Korean-made ballistic missiles containing components sourced from third-party suppliers.

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