Ukraine’s military announced a successful strike on a Russian chemical plant in the Bryansk region on Tuesday, employing UK-made Storm Shadow missiles, also known as Scalp. The General Staff of Ukraine’s Armed Forces confirmed that the “massive” strike penetrated Russian air defense systems, and they are currently assessing its outcome. The targeted Bryansk Chemical Plant is considered a critical facility within Russia’s military-industrial complex, responsible for producing gunpowder, explosives, and rocket fuel components essential for ammunition and missiles used against Ukraine. While Bryansk Governor Alexander Bogomaz acknowledged Ukrainian drone and missile attacks on the region, Moscow authorities have yet to comment directly on the chemical plant strike itself.

This Ukrainian offensive coincided with a unified stance from UK Prime Minister Sir Keir Starmer and other European leaders, who pledged to intensify pressure on Russia’s economy and defense industry until Russian President Vladimir Putin is prepared for peace. A joint statement signed by leaders from Ukraine, Germany, France, Italy, Poland, Denmark, Finland, the EU, and Norway emphasized the necessity for Ukraine to be in the strongest possible position both during and after any potential ceasefire. Kyiv has consistently maintained the imperative of targeting Russian military facilities, despite the Kremlin’s warnings against supplying Ukraine with long-range offensive weapons.

In response to these developments, Russia launched a series of retaliatory attacks on Ukrainian territory. Kyiv’s mayor, Vitali Klitschko, reported an overnight air attack on the capital, with witnesses hearing explosions indicative of active air defense systems. The city’s military administration head, Tymur Tkachenko, confirmed that the strikes killed at least two people, causing fires and shattering windows across multiple districts. Beyond Kyiv, other Ukrainian cities such as Zaporizhzhia, Dnipro, and the Danube River port city of Izmail were also targeted. Additionally, Russian strikes on Ukraine’s Chernihiv region on Tuesday resulted in four fatalities and left hundreds of thousands without power and many without water. The Energy Ministry stated that the regional capital, Chernihiv City, and the northern part of the province suffered complete electricity loss due to strikes on power facilities, though some supply was later restored. Local officials in Novhorod-Siverskyi also reported a daytime attack by approximately 20 Russian kamikaze drones, which killed four civilians and wounded at least seven, including a 10-year-old child.

Amid escalating military actions, diplomatic efforts aimed at resolving the conflict have suffered significant setbacks. Plans for a summit between Donald Trump and Vladimir Putin in Budapest were shelved following a reportedly unproductive phone call between Marco Rubio and Sergei Lavrov, which also led to the cancellation of their own scheduled meeting in Hungary’s capital. European diplomats indicated that Russia maintains a maximalist position, demanding that Ukraine cede the entire Donbas region, making a potential deal involving Trump in Budapest seem unfeasible. Trump, after initially agreeing to talks with Putin, later called the prospect a “wasted meeting,” citing Moscow’s refusal to cease fighting along the current front line as a major sticking point. This marked a shift from his previous position last month, where he suggested that Kyiv could “win all of Ukraine back in its original form,” referring to the country’s internationally recognized borders.

Ukrainian President Volodymyr Zelenskyy linked Russia’s diplomatic interest directly to Ukraine’s long-range capabilities, stating that Russia “almost automatically became less interested in diplomacy” once the prospect of US Tomahawk missiles for Ukraine diminished. He emphasized, “The greater the Ukrainian long-range capability, the greater the Russian willingness to end the war.” A senior Ukrainian official echoed this sentiment, describing the diplomatic efforts centered around Trump as “going in circles” and “dragged out.” Meanwhile, Trump’s most recent public stance advocates halting the war along the current front line without requiring territorial concessions from Ukraine.

European diplomats, however, are independently working with Ukraine on a new ceasefire proposal based on the current battle lines. This proposal reportedly includes a reference to a peace board that could be chaired by Trump and modeled on the US’s 20-point plan for Gaza. The underlying motivation for this European initiative appears to be, at least in part, to keep Washington engaged in supporting Ukraine by offering a significant role to Trump and the US, rather than a firm expectation of a deal acceptable to both warring parties. For instance, a suggestion to use frozen Russian assets to fund Ukrainian reparations is considered a “non-starter for Russia.” In parallel with these diplomatic efforts, 35 allies of Ukraine are scheduled to convene in London on Friday for a summit focused on providing long-term support to Kyiv.