Russian soldiers captured by anti-Kremlin fighters in Ukraine border battle.

The Russian Volunteer Corps, a militia of Russians who support Ukraine, has been attacking villages near the border. They claim to control more Russian territory in the area than Russia seized during the monthslong seige of the Ukrainian city of Bakhmut. The group invited Gov. Vyacheslav Gladkov to a meeting to discuss a prisoner exchange. At least 90 people were arrested Sunday across Russia as they protested the continued incarceration of opposition leader Alexei Navalny on his 47th birthday. Ukrainian border guards detained up to 20 men trying to go abroad illegally every day, authorities said. Retired U.S. General David Petraeus says the Ukrainian counteroffensive expected to crank up soon is going to attack Russian forces that are significantly depleted from heavy losses absorbed while claiming modest gains in Bakhmut and elsewhere.