Blinken, who made the announcement in Kyiv, said the $2 billion is in the form of Foreign Military Financing, a State Department program that gives foreign governments money to purchase US weapons. The majority of the funds are being pulled from the $61 billion in new Ukraine aid recently authorized by Congress, although $400 million is coming from previously allocated funds.

Blinken would not detail the weapons that will be purchased with the $2 billion but said it would be spent in several different ways. "We put this together in a first-of-its-kind defense enterprise fund, and it has three components," he said. "One is to provide weapons today, so this will assist Ukraine in acquiring those weapons."

He said it would also be used to help build up Ukraine's "defense industrial base" and "help Ukraine purchase military equipment from other countries, not just the United States, for Ukraine's use."