The text of the agreement, made public by Ukraine’s government, made no mention of the security guarantees that Kyiv had long sought.

Ukrainian Foreign Minister Andrii Sybiha hailed a minerals deal signed with the United States as "an important milestone" in relations with Washington on Thursday and discussed the agreement with the European Union's top diplomat.

After months of tense negotiations, the U.S. and Ukraine signed a deal that is expected to give Washington access to the country’s critical minerals and other natural resources.