Russian-backed Wagner Group gains ground in Ukraine as conflict escalates.

The leader of the private Russian mercenary firm Wagner Group, Yevgeny Prigozhin, has threatened mutiny unless Moscow sends his forces more ammunition as they battle for control of Bakhmut in eastern Ukraine. Meanwhile, Ukraine's government says a fresh wave of Russian missile attacks has destroyed an ammunition depot and injured dozens of civilians. On Monday, the Biden administration said Russia has suffered 100,000 casualties since December, with more than 20,000 Russian fighters killed in action.