The Trump administration said on Tuesday that it would immediately lift its suspension of military aid to Ukraine and its intelligence sharing with Kyiv.
It came more than a week after the US imposed the measures to push Ukrainian President Volodymyr Zelensky to enter talks to end the war with invading Russian forces.
The announcement came at talks between Ukraine and the United States in Saudi Arabia.
Ukraine also said it was open to a 30-day ceasefire in the war with Russia, subject to Kremlin agreement.