Ukraine said Saturday it struck an airbase in Russia, which continued overnight to use hundreds of drones in its stepped-up bombing campaign. The fresh wave of attacks signal a breakthrough isn't expected anytime soon in efforts to end the more than three-year-old war.

Ukraine’s military General Staff said Ukrainian forces had struck the Borisoglebsk airbase in Russia’s Voronezh region

The district's administrative centre, the town of Sergiyev Posad, is considered the religious centre of the Moscow Region and a spiritual heart of Russia's Orthodox Church. The city's monastery, the Trinity Lavra of St. Sergius that was founded in the 14th century, is a UNESCO World Heritage site.