Trump has said a minerals deal will help secure a peace agreement by giving the United States a financial stake in Ukraine's future. He also sees it as America's way of earning back some of the tens of billions of dollars it has given to Ukraine in financial and military aid since Russia invaded three years ago.

Ret. Lt. Gen. HR McMaster discusses the status of a potential minerals deal between the United States and Ukraine on 'The Story.'

After three days of intense negotiations, the Trump administration, Ukraine and Russia agreed to a limited ceasefire in which the key details, including what was covered and how it will start, were disputed by the warring sides.

Russia and Ukraine have accused each other of breaking the terms of a tentative U.S-brokered deal to pause strikes on energy infrastructure, underscoring the challenges to negotiating a broader peace in the war in Ukraine.

The U.S. reached deals with Ukraine and Russia to pause their attacks over the Black Sea and against each other's energy targets, but it was not clear when and how the deals would come into force.

Ukraine said a recent attack on Russia's Engels-2 air base destroyed 96 cruise missiles. Satellite images show blackened craters.

Russia launched 86 drones at Ukraine overnight on March 27. Additionally, the enemy attacked Ukraine with an Iskander-M ballistic missile from the Voronezh region, according to the Air Force of the Armed Forces of Ukraine.