US President Donald Trump announced a deal with Russian President Vladimir Putin for Moscow to supply millions of tons of diesel fuel to American and global markets. 

The announcement would give Russia a major opportunity to sell fuel abroad at a time when Ukraine is targeting its oil industry to deprive Moscow of revenue and disrupt the resources sustaining its invasion. The US president has increasingly called for Ukraine to halt strikes on Russian oil infrastructure in recent weeks, blaming Ukraine for high fuel prices in the US.

Trump’s push for Kyiv to halt those attacks, alongside his effort to secure Russian fuel supplies, risks undermining Ukraine’s campaign to put economic pressure on the Kremlin while the US seeks to contain the fallout from its war with Iran.

Trump promises millions of tons of diesel from Russia

In a 9 October post on Truth Social, Trump said Russia would immediately supply more than 300,000 tons of diesel, followed by another 500,000 tons in November and 1 million tons shortly afterward. He also announced a possible additional delivery of 3 million tons, conditional on the state of Russian refineries.

“Diesel Prices for Americans and, indeed, the World, will be COMING DOWN, IN RECORD NUMBERS, AND FAST!” Trump wrote, describing lower fuel prices as a top priority for American farmers, ranchers, and truckers.

Trump's announcement did not explain how the promised volumes would be reconciled with the condition of Russian refineries amid ongoing Ukrainian strikes, which he cited as a factor determining the timing of later deliveries.

Trump has pressed Ukraine to stop targeting Russian refineries

The announcement comes after Trump repeatedly blamed Ukrainian strikes on Russian oil infrastructure for worsening global diesel shortages and driving up fuel prices.

Ukraine has continued targeting Russian oil facilities as part of its campaign to undermine Moscow's war economy. Ukrainian strikes have damaged refining capacity, contributed to fuel shortages inside Russia, and forced Moscow to restrict fuel exports. 

Kyiv has argued that the attacks put pressure on Russia's ability to finance and sustain its war against Ukraine.

Iran war drives fuel prices higher, not Ukraine

The rise in US fuel prices stems largely from the US-Israeli war with Iran and its disruption of global energy supplies, according to Reuters. The conflict has disrupted shipping through the Strait of Hormuz, a strategic waterway through which roughly one-fifth of the world's oil supplies normally pass, pushing energy prices higher. 

Trump has nevertheless blamed Ukraine's refinery strikes for rising fuel costs while pressing Kyiv to halt them.

Ukraine's attacks on Russian oil infrastructure are intended to weaken Moscow's war economy. By contrast, the disruption to global energy shipments stems largely from the conflict with Iran. 

Zelenskyy warns Russian diesel deal would fund further attacks on Ukraine

Ukrainian President Volodymyr Zelenskyy warned later on 9 October that allowing Russia to sell petroleum products abroad without securing a lasting de-escalation agreement would help finance Moscow's war against Ukraine.

“Allowing Russia to sell petroleum products is an investment in a war that must be ended, not prolonged,” Zelenskyy said, responding to Trump's announcement of a proposed Russian diesel supply deal.

Zelenskyy said Ukraine's strikes on Russian oil refineries and other oil facilities were a response to Russia's years-long campaign against Ukrainian energy infrastructure. He offered a reciprocal arrangement under which Ukraine would stop striking Russian refineries if Russia stopped destroying Ukrainian energy facilities, saying the United States had sufficient leverage to secure such an agreement.

“Ukraine will not burn Russian oil refining facilities if Russia does not destroy our energy infrastructure,” Zelenskyy said.

He also urged Washington to maintain pressure on Moscow, including sanctions under the proposed Graham legislation, and to continue supporting Ukraine's defense. Zelenskyy argued that easing sanctions without a clear, sustained de-escalation agreement would signal weakness and give Russia more time and resources to continue the war.

“Gifts to Putin will not bring peace,” Zelenskyy said, warning that Russia would respond to diesel supplies with further terror and attacks. He called on the United States to pursue a reciprocal de-escalation agreement and press Russia to stop its attacks on Ukrainian energy infrastructure.

Montenegro has ordered the expulsion of Mikhail Zvynchuk, head of the pro-Kremlin military information network Rybar, and four other Russian citizens over national security concerns following a security operation targeting suspected Russian hybrid influence activities, Vijesti reported on 9 October.

Zvynchuk is the founder and head of Rybar, a prominent Russian military-focused information network known for its Telegram channels covering Russia's war against Ukraine. The network promotes pro-Kremlin narratives and has been associated with Russian propaganda and influence operations.

Montenegrin police announced on 9 October that the five Russians had their residence rights revoked and were ordered to leave the country on national and internal security grounds. 

Montenegro investigates suspected Russian hybrid activity

The operation involved Montenegro's police and National Security Agency (ANB), which seized drones, high-resolution recording equipment, cameras, and several mobile phones for further examination, according to Vijesti.

According to Montenegrin authorities, the five had arrived in the country less than two days before the operation. The investigation is being conducted with support from international partners.

Montenegrin police identified the five Russian citizens as Zvynchuk, his wife Valeria Zvynchuk, Sergei Belous, Pavel Lekatorchuk, and Kira Doroshenko. Authorities said the case had been referred to prosecutors in Podgorica and Kotor.

The European Union has sanctioned Zvynchuk over activities that undermine or threaten Ukraine's territorial integrity, sovereignty, and independence. He has also been sanctioned by the United Kingdom, Switzerland, Australia, and Ukraine, according to Vijesti.

Suspected influence operation targeting EU integration

Vijesti reported, citing security sources, that Montenegrin authorities suspected the group of planning a documentary intended to undermine public support for the country's European integration.

According to the outlet, the planned material would portray Montenegro's expected alignment of its visa policy with EU standards as a politically imposed measure that threatens tourism, economic stability, and national interests.

Security services had monitored the group's arrival before carrying out the operation in Risan, in the Bay of Kotor area, Vijesti reported. The equipment seized from the group will undergo expert analysis to establish its intended purpose and use in Montenegro.

Medvedev threatens imprisoning “European and American idiots” for prisoner exchanges

Former Russian President Dmitry Medvedev responded to the operation by suggesting Moscow might need to expand its pool of prisoners to exchange for Europeans and Americans to secure Zvynchuk's return.

“We will probably have to replenish our pool of prisoners for exchange with European and American idiots,” Medvedev said, according to Vijesti.

Montenegro, a NATO member and EU candidate, has aligned itself with EU sanctions against Russia following Moscow's full-scale invasion of Ukraine in 2022. The expulsion comes amid broader European concerns over Russian intelligence activity, propaganda, and other forms of hybrid interference. 

Ukrainian assault troops suffered more than 10 times fewer casualties than Russian forces during Operation Vivaldi, a Ukrainian military veteran said on 9 October, describing the ratio as unprecedented and highlighting Ukraine’s improved ability to protect its soldiers during offensive operations.

The counteroffensive has been a significant Ukrainian success, reclaiming territory in northern Donetsk Oblast and disrupting Russia’s plans to advance toward Sloviansk and Kramatorsk. The reported casualty ratio points shows Ukraine’s ability to make offensive gains while reducing the human cost of assaulting fortified positions.

Yevhen Dykyi made the remarks in an interview with Radio NV, saying the results showed how Ukrainian forces had learned to limit losses while attacking defended Russian positions.

Protecting troops during offensive operations

Dykyi said the casualty ratio was one of the operation’s most important outcomes.

He said that Ukrainian assault troops suffered more than 10 times fewer casualties than Russian forces during the counteroffensive.

“That speaks volumes. We have learned how to protect our people, and that is extraordinarily vital,” he added.

Operation Vivaldi disrupted Russia’s advance in Donetsk

The Third Army Corps launched Vivaldi in mid-September in northern Donetsk Oblast, near Lyman, where Russian forces had spent months trying to advance toward Ukraine’s fortified cities of Sloviansk and Kramatorsk.

The operation aimed to clear Russian troops from positions north of Lyman and disrupt Moscow’s plans to encircle the remaining Ukrainian-held parts of Donetsk Oblast. Ukraine’s Third Army Corps announced the counteroffensive on 15 September, initially reporting that its forces had cleared Russian infiltrators from several settlements and liberated Serednie.

By 30 September, Ukraine had regained 176 square kilometers of territory during the operation, according to figures cited by the Ukrainian presidential office. Ukrainian authorities also reported that their forces had captured around 250 Russian soldiers and inflicted more than 5,000 Russian casualties, including killed and wounded. 

The counteroffensive also disrupted Russia’s effort to advance behind Ukraine’s fortified defensive line. By threatening Russian positions north of Lyman, Ukrainian forces complicated Moscow’s plans to encircle the Sloviansk-Kramatorsk area rather than attack its defenses head-on.

Unmanned systems help limit casualties

A key feature of Vivaldi has been the use of unmanned systems to attack fortified Russian positions before Ukrainian infantry moves in. Ukrainian forces deployed ground robots carrying grenade launchers to fire into Russian shelters, while explosive ground vehicles were used to destroy bunkers and strongpoints.

In one reported tactic, heavy drones delivered kamikaze ground robots more than 10 kilometers behind Russian lines, allowing Ukrainian operators to attack positions without exposing infantry to direct fire.

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