Ukraine's former Defense Minister Fedorov to open defense tech firm with backing from Palantir CEO

"Today we want to warn every airline that uses Russian airspace, every insurer, everyone who still uses key Russian airports — Russian skies are becoming completely dangerous," Zelensky said.

"Now we want to use this experience to build technologies that will strengthen Ukraine, help our allies, and ultimately make the world safer," former Defense Minister Mykhailo Fedorov said.

Russia continued its attacks on Kyiv for another consecutive night as air defenses in Ukraine's capital shot down Russian drones into Sept. 1, according to Kyiv Independent journalists on the ground.

"We have clear indications from our intelligence services and partner agencies, as well as from investigations in Germany and in our European partner countries, of Russian involvement," German Interior Minister Alexander Dobrindt said.

Koretskyi said the move was necessary as the defense against Russia's full-scale invasion is becoming significantly more expensive.

A Ukrainian drone attack damaged the Russian Baltic Sea port of Ust-Luga in Leningrad Oblast early on Sept. 1, regional Governor Alexander Drozdenko said.

One drone crossed into southeastern Estonia, while another flew toward the border city of Narva but changed course before entering the country’s airspace, Estonian Air Force Commander Brigadier General Riivo Valge told public broadcaster ERR.

The heaviest toll was reported in Kyiv and the surrounding oblast, where Russia’s fifth consecutive day of attacks killed at least 12 people and injured 21 others.

U.S. Army Secretary Dan Driscoll has played a role in Washington's efforts to end Russia's war against Ukraine and previously advocated for closer U.S.-Ukraine military cooperation.