Ukraine said it struck a Russian air base on Saturday, while Russia continued to attack Ukraine with hundreds of drones overnight as part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Ukraine said Saturday it struck a Russian airbase that military officials called a "home base" of some fighter jets.

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.