A Ukrainian F-16 pilot has offered a rare glimpse into the U.S.-sourced combat jets missions on the front lines.

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.