Some European diplomats in Seoul are weighing whether they can still trust South Korea as a like-minded partner if it grows closer to Russia, the Financial Times reported on 28 October, according to South Korea’s Financial News. One European diplomat also told the FT that Seoul wants to resume trade with Russia as soon as the war ends.

As Russia presses its war against Ukraine, Kyiv’s partners count on each other to keep up the pressure on Moscow. The doubts about South Korea now come from its European partners, not only from Kyiv. The report lands eight days after Seoul said it would withdraw about half its staff from Kyiv over a dispute about two North Korean prisoners of war.

An Arctic voyage, a new adviser, and signals from Moscow

According to the FT, European diplomats saw a South Korean pilot voyage along Russia’s Arctic sea route as a sign of a tilt toward Russia, since the voyage required extensive cooperation from Moscow.

Meanwhile, on 1 October, South Korean President Lee Jae-myung appointed Song Young-gil, a six-term lawmaker and former chair of parliament’s foreign affairs committee, as his special adviser on peace diplomacy. Song once served as a special envoy to Russia, the FT noted.

On 20 October, Russian Deputy Foreign Minister Andrei Rudenko said Seoul had signaled it wants to normalize relations but says full normalization can come only after a change in the geopolitical situation, which he said means the end of the war in Ukraine.

Fuel for Russia loaded at South Korean ports, but Seoul denies direct exports

The FT also cited reports of fuel shipments to Russia. A Guardian analysis published on 6 October found that more than 176,000 tons of fuel, mostly diesel, were loaded at South Korean ports in July and August. The fuel went onto seven tankers bound for Russia’s Far East, three of them under UK and EU sanctions. The Guardian said the trade does not appear to breach South Korean law.

On 8 October, South Korea’s foreign and trade ministries and customs service said no diesel, jet fuel, or gasoline had been exported to Russia through customs. They said they would examine the tankers’ routes and any divergence from their declared destinations before judging whether the law had been broken.

Ukraine’s sanctions commissioner Vladyslav Vlasiuk said the shipments helped Russia offset refinery losses caused by Ukrainian strikes. South Korea’s presidential office called the claim inaccurate and inappropriate, saying the key facts of the transactions had not been verified.

Seoul backs Ukraine, but sanctioned tankers carried fuel from South Korea to Russia

Seoul rejects the criticism

In a statement to the FT, South Korea’s Foreign Ministry said concerns in some quarters that the country was leaning too far toward Russia were not based on fact. It added that Seoul supports international efforts to end the war in Ukraine.

Seoul cuts its Kyiv embassy staff over the POW dispute

At the same time, relations with Ukraine have deteriorated over the transfer of two North Korean prisoners of war to South Korea, which Zelenskyy disclosed at the UN General Assembly in September. Seoul says the disclosure broke a confidentiality understanding. Dmytro Lytvyn, Zelenskyy’s communications adviser, wrote in a Facebook comment on 25 September that “there was no such agreement.”

On 20 October, Seoul said it would withdraw roughly half its diplomatic staff from Kyiv, citing Kyiv’s failure to take “positive steps” on the POW dispute and continued Russian airstrikes, Yonhap reported. A chargé d’affaires and all consular staff will stay.

Russia has started installing magnetometers in the tails or tail fins of its Geran attack drones, Vladyslav Vlasiuk, the Ukrainian president’s commissioner for sanctions policy, said on Facebook on 28 October.

Russia uses its Shahed-Geran series drones in massive daily attacks on Ukraine. Ukrainian forces jam Gerans’ satellite navigation to push them off course, and Russia keeps hardening the drones against it, already fitting them with adaptive antennas. The magnetometer appears designed to go further, giving the drone a heading that doesn’t depend on satellites at all. Earlier this month, Ukrainian military intelligence reported a US-made magnetometer in the upgraded Geran-4.

A new jamming device, and Western parts at the core

Vlasiuk posted photos from a site where Ukraine studies Russian weapons and their components. He said he takes the findings for Ukraine’s sanctions work. He did not say which Geran models carry the magnetometer.

At the same time, Ukraine is studying how a new jamming device works. Vlasiuk did not say where it was found or what it targets.

“Western electronics are at the core everywhere,” Vlasiuk wrote.

Geran-4 already flew with a US-made sensor

On 5 October, Ukraine’s Defense Intelligence (HUR) said the upgraded Geran-4 carries a new “MOKh” unit built around a PNI5GA magnetometer made by US firm PNI Sensor. The unit works with the SADRA inertial navigation module to cut gyroscope drift and make the drone’s autonomous navigation more accurate.

HUR said Russia also added an electro-optical navigation system called Susanin to the upgraded Geran-4. It compares camera images with a reference image stored in memory to keep the drone on its route to the target. The new K5 version of the Geran-5 uses a similar system.

Presidential adviser Serhii “Flash” Beskrestnov warned on 28 October that if Russia starts using Susanin en masse on Geran-5s and other drones and missiles at night, Ukraine may have to go back to switching off lights, especially on roads.