Air quality drops in Kyiv as fighting continues nearby.

"I guarantee you that if Europe put on substantial secondary tariffs on the buyers of Russian oil, the war would be over in 60 or 90 days," U.S. Treasury Secretary Scott Bessent said.

The number includes 910 casualties that Russian forces suffered over the past day.

Russia has revived barter in its foreign trade for the first time since the 1990s, exchanging goods such as grain and flax seeds for Chinese cars and construction materials in an effort to evade sanctions, Reuters reported Sept. 15.

Regional Governor Ivan Fedorov said the city had sustained at least 10 strikes amid the attack which targeted both homes and "non-residential buildings."

The Kirishi refinery is one of the largest in Russia and has a processing capacity of over 17 million tons of oil per year. A fire broke out at the facility during a Ukrainian drone attack, Leningrad Oblast Governor Alexander Drozdenko claimed.

"Eastern Sentry is not just a new initiative – it is a clear signal: NATO’s borders are inviolable, and the security of our citizens remains a priority," Poland's General Staff wrote on X.

Ukraine's Air Force said Russian forces launched 84 Shahed-type attack and decoy drones and three S-300 missiles overnight.

Capturing the city of Kupiansk serves as Russia's main goal in Kharkiv Oblast, operational-strategic command "Dnipro" spokesperson Oleksiy Belsky said on Sept. 15, amid Russia's attempted infiltrations into the key Ukrainian stronghold.

The Polish prime minister said that the drone had been operating near several government buildings in the Polish capital, including the Belweder palace, which serves as one of the official presidential residences as well as a guest house for international dignitaries.

"As I begin my mission as Ukraine's Ambassador to the United States, I carry with me the courage and resilience of our people," Olha Stefanishyna said.

Total expenditures are projected at Hr 4.8 trillion ($116.5 billion), an increase of Hr 415 billion ($10 billion) compared to 2025.

The deal gives the U.S. special access to investment projects in Ukraine, spanning natural resources, related infrastructure, and even defense projects.

The European Union and Ukraine have completed the final screening meetings for Chapter 11 of accession negotiations, focused on "Agriculture and Rural Development."