The Ukrainian and Russian sides have given conflicting statements on whether Ukraine’s counteroffensive has begun, amid fierce fighting for the eastern city of Bakhmut. The head of Russia’s mercenary Wagner Group, Yevgeniy Prigozhin, said his forces control most of the city but that a Ukrainian counteroffensive is “in full swing,” with successful attacks on Russian forces. Later Friday, Prigozhin called on Russia’s defense leaders to “stop lying” about the battlefield state of play.