The Biden administration announced Wednesday it was delivering $250 million in military assistance to Ukraine, the final package it can move under its existing resources drawn down for the country.

The delivery comes as Congress is stuck on approving new funds for Ukraine. Aid to the war-torn ally has been held up in a larger package that was also to include border security funding.

Congress left town this month seemingly far apart on a border deal that might unlock the Ukraine aid, which is meant to cover Kyiv’s needs in 2024.

The new package announced Wednesday includes air defenses and ammunition delivered from American military stockpiles. The $250 million cost represents the cost of replenishing the U.S. stocks.

“The United States is announcing the year’s final package of weapons and equipment for Ukraine,” Secretary of State Antony Blinken said in a statement.

“It is imperative that Congress act swiftly, as soon as possible, to advance our national security interests by helping Ukraine defend itself and secure its future.”