Joe Biden will approve an additional $250m in security assistance for Ukraine, US defence secretary Lloyd Austin has announced today.
Speaking at US air base Ramstein, he said: "It will surge in more capabilities to meet Ukraine’s evolving requirements. And we'll deliver them at the speed of war."
The US official also pointed to the situation in Kursk as an example of how Ukraine was working to seize the battlefield initiative.
"The Kremlin's army of aggression is now on the defensive on its own turf," he added.
The announcement comes at a high-risk moment for Ukrainian forces, who are advancing into Russia's Kursk region even as Russian forces are threatening the eastern Ukrainian city of Pokrovsk.
Russian forces, which control 18% of Ukraine, have been gradually advancing in the east since Kyiv's 2023 counteroffensive attempt.
The Kremlin has also said conditions for peace talks with Ukraine do not now exist.