The attack appeared to have been inspired by white supremacist ideology, Telegram channels close to intelligence agencies reported.

Russian Deputy Foreign Minister Sergey Ryabkov told ABC News during an exclusive interview in Moscow on Monday that he believes the warring parties are close to a deal.

Russian Deputy Foreign Minister Sergey Ryabkov told ABC News that he is "very much confident and pretty sure" that Moscow and Kyiv are "on the verge" of a deal to end the war, as U.S.-brokered peace talks make slow but steady progress.

Russian crude prices are at their lowest since the war in Ukraine began, as sanctions deepen the discounts the nation’s oil industry needs to offer and benchmark futures tumble.

Ukrainian President Volodymyr Zelenskyy visits the frontline city of Kupiansk days before crucial Berlin talks with Trump envoys on security guarantees.

The Kremlin has described Ukraine’s push to join NATO as one of the “root causes” of the conflict. Russia sees an expanding NATO as a major security threat. But NATO’s expansion into the Baltics and other post-Soviet states is driven by a fear that Moscow would one day invade and try to fold them back under its control—as seen in Ukraine.

The U.S. has agreed to provide unspecified security guarantees to Ukraine as part of a peace deal to end Russia's nearly four-year war, and more talks are likely this weekend, U.S. officials said Monday following the latest discussions with Ukrainian President Volodymyr Zelenskyy in Berlin.

Russia’s Central Bank says it has filed a lawsuit against Belgian financial institution Euroclear. That's the Brussels-based clearing house that holds most of Moscow’s frozen assets in Europe.

Oil revenue is a key part of Russia's economy, allowing President Vladimir Putin to pour money into the war effort against Ukraine without worsening inflation for everyday people and avoiding a currency collapse.